{"title":"How to troubleshoot your HID bulbs","description":"\u003cdiv class=\"category-description\"\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"font-size: 18pt;\"\u003eHOW TO TROUBLESHOOT YOUR HID BULBS\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003eFactors of Lamp Life:\u003cbr\u003e\u003col\u003e\n\u003cli\u003eLamp Type – Metal Halide have the shortest life span of the 3 HID lights, Pulse start Lamps have a longer Life.\u003c\/li\u003e\n\u003cli\u003eBurn Position – HID lamps must be used in their designated burn positions unless specified as “Universal Burn” \u003c\/li\u003e\n\u003cli\u003eConfiguration – HID lamps on a pulse start system tend t have a longer life. \u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cbr\u003eProbe Start (standard) HID lamps have a longer warm up time then Pulse Start lamps. \u003cbr\u003e\u003cbr\u003eAll trouble shooting of HID bulbs and fixtures should be done by a qualified electrician. \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM 1 - LAMP WILL NOT START\u003c\/span\u003e\n\n\u003cstyle type=\"text\/css\"\u003e\n.bordered-left {\n    border: solid #ccc 1px;\t\n    padding: 50px;\n    -moz-border-radius: 0px;\n    -webkit-border-radius: 0px;\n    border-radius: 0px;\n    -webkit-box-shadow: 0 0px 0px #ccc; \n    -moz-box-shadow: 0 0px 0px #ccc; \n    box-shadow: 0 0px 0px #ccc;    \n    float:left;\n    margin: 50px;    \n}\n\n\u003c\/style\u003e\n\n\n\u003ctable width=\"685\" border=\"1\" cellspacing=\"5\" cellpadding=\"5\" class=\"bordered-left\"\u003e\n  \u003ctr\u003e\n    \u003cth width=\"250\" scope=\"col\"\u003ePOSSIBLE CAUSE\u003c\/th\u003e\n    \u003cth width=\"394\" scope=\"col\"\u003eCORRECTIVE ACTION\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e1. No Power to Ballast\u003c\/td\u003e\n    \u003ctd\u003eCheck fuses or other causes of power outages.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e2. Normal End of Lamp Life\u003c\/td\u003e\n    \u003ctd\u003eOften the simplest procedure is to test the lamp in an adjacent fixture which is known to be operating properly and then replace as necessary. It should be kept in mind that series ballasts will occasionally extinguish the adjacent lamp if one is removed.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e3. Lamp Loose in Socket\u003c\/td\u003e\n    \u003ctd\u003eInspect the lamp to see if there is any indication of arcing at center contact button. Tighten lamp to seat it properly. If base is distorted and will not seat properly in the socket, replace lamp.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e4. Optical \u0026amp; Other Sensing Devices Inoperative\u003c\/td\u003e\n    \u003ctd\u003eReplace sensing device. (Check this by covering sensing device to block out light while power is applied to fixture.)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e5. Defective or Improper Wiring\u003c\/td\u003e\n    \u003ctd\u003eExamine wiring to ensure it conforms with wiring diagram on the ballast label. Check primary wiring to ballast and from ballast to socket to establish circuit continuity. Check connections to see that they are secure. Check for under-sizing of wire gauge, resulting in lowered voltage. Repair circuit.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e6. Voltage at Fixture Too Low\u003c\/td\u003e\n    \u003ctd\u003eMeasure line voltage at input of ballast. For most types of ballasts, measured line voltage should be within 10% of label rating. With many types of distribution systems, increased loading or demand decreases available voltage at the ballast primary. Therefore, ideally, a check should be made at full load. If tapped ballast, match ballast tap connection to supply voltage measured at ballast. Increase supply voltage if feasible. Verify that lamp to remote ballast distance is acceptable.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e7. Incompatible Ballasting\u003c\/td\u003e\n    \u003ctd\u003eCorrect ballasting is essential for dependable HID lamp operation. Any HID lamp will perform erratically or fail to start on an incorrect ballast. Make sure that the ballast label data agrees with the line voltage and lamp used. Incorrect ballasting will generally cause a lamp to fail prematurely.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e8. Defective Shorted Ballast\u003c\/td\u003e\n    \u003ctd\u003eA shorted ballast will generally cause the seals at the end of the arc tube to rupture with an indicative blackening in the seal ring area. Shorted condition may be due to shorted capacitors, shorted leads or shorted winding. Replace components as required.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e9. Improper Lamp Operating Position (Metal Halide Only)\u003c\/td\u003e\n    \u003ctd\u003eThe operating position should agree with the lamp specifications. A BU-HOR lamp can be operated base up, vertical to, and including the horizontal, and BD can be operated base down, vertical to, approaching, but not including the horizontal. A lamp operated beyond the specified position may not start and degrade lamp performance if it does start.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e10. Lamp Has Been Operating : Cool Down Time Insufficient (Hot Restrike)\u003c\/td\u003e\n    \u003ctd\u003eWhen HID lamps are operating and the supply voltage is cut or interrupted, the lamps will require a period of time to cool and re-establish optimum starting conditions. Bare mercury and metal halide lamps require from four to eight minutes cool down time. High pressure sodium lamps require approximately one minute to cool before restriking. In a luminaire, restart time varies with the degree of ventilation built into it, ambient temperature, and draft conditions. The time from cool to restartable condition can realistically range up to 20 minutes for mercury and metal halide lamps in tight luminaires.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e11. High Restrike Voltage (Metal Halide Only)\u003c\/td\u003e\n    \u003ctd\u003eThis condition is peculiar to the metal halide lamp. It does not occur with mercury. If the supply voltage to a metal halide lamp is interrupted during the warm up period, the subsequent restrike voltage (voltage required to restart the lamp) may be higher than that required for a lamp which has been allowed to stabilize (come up to full output normally) or to cool down to normal room temperature.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e12. Improper Ballast for Lamp Operating Conditions\u003c\/td\u003e\n    \u003ctd\u003eEnvironmental conditions such as extreme temperatures, high humidity and other factors affect ballast operation. Check lamp environmental operating conditions against published performance.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e13. End of Ballast Life\u003c\/td\u003e\n    \u003ctd\u003eThe appearance or condition of a ballast may give a clue to whether it is good or not. If it is charred, it may have been subjected to sustained excessive heat. Swollen capacitors indicate trouble. Check with appropriate testers, ammeter, and voltmeter. Frequently, the failure mode of a ballast is capacitor failure with consequent low power factor operation and high current. This leads to overheating of the core and coil and eventual failure.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e14. Defective Ignitor\u003c\/td\u003e\n    \u003ctd\u003eInsure that the lamp is good. Disconnect the ignitor and install a specified test lamp. If the test lamp lights, the ballast is good but the ignitor is not. Replace ignitor. If the test lamp does not light, the ballast has most likely reached its end of life.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e15. Mismatched Ignitor\u003c\/td\u003e\n    \u003ctd\u003eVerify that the ballast and ignitor are matched according to the specifications. Replace if necessary.\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e16. Lamp Defects\u003c\/td\u003e\n    \u003ctd\u003e\n\u003cp\u003eCommon defects that require the lamp to be replaced include:\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003eArc tube leak\u003c\/li\u003e\n        \u003cli\u003eOpen welds\u003c\/li\u003e\n        \u003cli\u003eProbe or cathode moly electrolysis\u003c\/li\u003e\n        \u003cli\u003eDiode or switch shorted\u003c\/li\u003e\n        \u003cli\u003eQuartz devitrification around rod\u003c\/li\u003e\n        \u003cli\u003eSodium leak\u003c\/li\u003e\n        \u003cli\u003eOpen diode\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n     \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        2—LAMP LIFE IS REDUCED \u003c\/span\u003e\u003c\/p\u003e\n      \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\n        \u003ctbody\u003e\n\u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE\u003c\/p\u003e\n          \u003c\/td\u003e\n          \u003ctd align=\"center\" valign=\"top\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e1. Lamp Physically Damaged \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eInvestigate the possibility of outer \n              bulb damage from handling or transportation that may have cracked \n              glass. If air enters outer bulb, arc tube may continue to burn for \n              100 hours before failure. Check to see if the bulb is broken where \n              glass meets the base due to twisting lamp too firmly into socket \n              or scoring of glass where socket inadvertently touches the lamp \n              bulb. Look for broken arc tube or loose metal parts. A leak in the \n              outer bulb will cause oxidation of the metal parts inside. In high \n              pressure sodium, the dark gettering material in the neck of the \n              bulb near the base will turn white or disappear. Replace lamp. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e2. Wrong Ballast \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eMake sure that the ballast label agrees \n              with the line voltage and the installed lamp. The 1,000 watt Mercury \n              lamp, for example, is made in the H34 (High Current) and the H36 \n              (Low Current) types with a separate ballast available for each type. \n              If the H34 ballast is used with the H36 lamp or vice versa, the \n              life of the lamp will be adversely affected and can destroy the \n              ballast. A similar situation exists with S55, S56 and S63 150 watt \n              high pressure sodium lamps. \u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e3. Lamp Operating in Incorrect Position \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eEither change positioning of fixture \n              or replace lamp with one suitable for that position. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e4. Faulty Capacitor \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eTo check capacitor, disconnect and \n              discharge it. Then, using an ohmmeter, set to the highest scale, \n              check for faults, 1) if meter reads low resistance initially and \n              increases, capacitor is good. 2) if meter reads low resistance initially \n              and remains the same, the capacitor is SHORTED and should be replaced. \n              3) if meter reads high resistance initially and remains the same, \n              the capacitor is OPEN and should be replaced. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n\u003c\/table\u003e\n      \u003cp align=\"center\"\u003e\u003cbr\u003e\u003c\/p\u003e\n      \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        3— LAMP FLICKERS OR CYCLES ON AND OFF\u003c\/span\u003e\u003c\/p\u003e\n      \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\n        \u003ctbody\u003e\n\u003ctr\u003e \n          \u003ctd align=\"center\" height=\"40\" valign=\"top\" width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE \u003c\/p\u003e\n          \u003c\/td\u003e\n          \u003ctd align=\"center\" height=\"40\" valign=\"top\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION \u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e1. Wrong Ballast \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"top\" width=\"355\"\u003e \n            \u003cp\u003eWith mercury lamps, improper ballasting \n              can cause flickering or erratic operation. With metal halide lamps, \n              the effect is generally noticed in the startup period when the lamp \n              ignites, starts to warm up and then extinguishes (cycling). This \n              may be caused by improper voltage\/current relationships delivered \n              by ballast. Under certain conditions new lamps may \"cycle\". \n              Usually after three tries to start at 30 to 60 second intervals \n              lamps will stabilize and operate normally. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"top\" width=\"250\"\u003e2. High \n            Lamp Operating Voltage\/Low Open Circuit Ballast Voltage\u003c\/td\u003e\n          \u003ctd valign=\"top\" width=\"355\"\u003e \n            \u003cp\u003eMeasure lamp operating voltage. Measure \n              ballast open circuit voltage. Replace as required.\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e3. Variable Voltage \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"top\" width=\"355\"\u003e \n            \u003cp\u003eHeavy motor loads or welding appliances \n              on line can cause flickering during operation. Remove lighting circuits \n              from the circuits serving these devices. Provide voltage regulators. \n              Check for loose connection. Use of Constant Wattage Isolated (CWI) \n              ballasts not Constant Wattage Auto (CWA) can frequently help \n              this situation. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e4. HPS Cycler \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"top\" width=\"355\"\u003e \n            \u003cp\u003eAs a high pressure sodium lamp is burned \n              for long periods of time, its operating voltage tends to increase. \n              When this point is reached, the lamp will exhibit cycling on and \n              off characteristics. This is normal end of life lamp. Replace the \n              lamp after checking ballast open circuit voltage and lamp operating \n              voltage.\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n\u003c\/table\u003e\n      \u003cp align=\"center\"\u003e\u003cbr\u003e\u003c\/p\u003e\n      \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        4—LAMP STARTS SLOWLY (ARC DOES NOT STRIKE WHEN SWITCH IS TURNED ON.)\u003c\/span\u003e\u003c\/p\u003e\n      \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\n        \u003ctbody\u003e\n\u003ctr\u003e \n          \u003ctd align=\"center\" width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE \u003c\/p\u003e\n          \u003c\/td\u003e\n          \u003ctd align=\"center\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e1. \n            Hard Starter\u003c\/td\u003e\n          \u003ctd align=\"left\" valign=\"top\" width=\"355\"\u003eA \n            hard starter is a lamp which will not start rapidly. It may glow for \n            extended periods of time destroying cathodes. It should be replaced \n            after checking voltage and ballast.\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n\u003c\/table\u003e\n      \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        5— FUSES BLOW OR CIRCUIT BREAKERS OPEN ON LAMP START UP\u003c\/span\u003e\u003c\/p\u003e\n        \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\n        \u003ctbody\u003e\n\u003ctr\u003e  \n          \u003ctd align=\"center\" width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE \u003c\/p\u003e\n          \u003c\/td\u003e\n           \n          \u003ctd align=\"center\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e1. Overloaded Circuit \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eRewire to accommodate starting current \n              of lamp\/ballast combination. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd height=\"50\" valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e2. High Momentary Transient Current \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd height=\"50\" valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eCan be caused by reactor or autotransformer \n              ballasts which draw high initial currents. Use current protective \n              devices incorporating time delay elements. If these fail, change \n              ballast as its characteristics will affect lamp life. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n\u003c\/table\u003e\n      \u003cdiv align=\"center\"\u003e\n\u003cbr\u003e\n         \u003c\/div\u003e\n      \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        6—LAMP LIGHT OUTPUT LOW\u003c\/span\u003e\u003c\/p\u003e\n       \n        \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\n        \u003ctbody\u003e\n\u003ctr\u003e  \n          \u003ctd align=\"center\" width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE \u003c\/p\u003e\n          \u003c\/td\u003e\n           \n          \u003ctd align=\"center\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e1. Normal Light \n            Output DepreciationThroughout Life \n            \u003cblockquote\u003e \n              \u003cp\u003e \u003c\/p\u003e\n            \u003c\/blockquote\u003e\n          \u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eRefer to maintenance characteristics \n              of lamp in technical publications comparing light output vs. burning \n              time. If depreciation is within published range, replace lamp. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e2. Incorrect Voltage \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eCheck ballast label to see if rating \n              designation conforms to lamp rating description. Correct if necessary. \n              Check line voltage at ballast and set ballast tap to voltage reading. \n              If not tapped, check ballast voltage range against input voltage. \n              Check wiring connections for voltage loss points. Check socket contact \n              point. Use CWI ballast. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e3. Incorrect Ballast Output \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003e Check ballast output to determine \n              if it conforms to lamp requirements. If voltage and current do not \n              stabilize in five to ten minutes warm-up time, ballast output is \n              incorrect and adjustment should be made. Check capacitor wiring, \n              if visibly available, to determine if capacitors are properly wired.\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e4. Dirt Accumulation \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eCheck and clean lamp and luminaire. \n              Establish maintenance program.\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd height=\"38\" valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e5. Faulty Capacitor \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd height=\"38\" valign=\"TOP\" width=\"355\"\u003e \n            \u003cp\u003eCheck capacitor rating to specification. \n              Measure capacitance to specification using capacitance meter. Replace \n              capacitor if necessary. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n\u003c\/table\u003e\n      \u003cp align=\"center\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\n        \u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        7—ARC TUBE BECOMES BLACKENED OR SWOLLEN EARLY IN LIFE \u003c\/span\u003e\u003c\/p\u003e\n      \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003e \n        LAMP\/ARC TUBE MAY SHOW SIGNS OF SCORCHING\u003c\/span\u003e\u003c\/p\u003e\n        \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\n        \u003ctbody\u003e\n\u003ctr\u003e  \n          \u003ctd align=\"center\" width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE \u003c\/p\u003e\n          \u003c\/td\u003e\n           \n          \u003ctd align=\"center\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e1. Overwattage \n            Operation Improper Ballasting\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"246\"\u003e \n            \u003cp\u003eCheck for possibility that lamp is \n              operated on ballast designed for higher wattage lamp. Overwattage \n              operation can cause premature blackening. Check ballast label against \n              lamp specification.\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e2. Excessive Current or Shorted Capacitor(s) \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"246\"\u003e \n            \u003cp\u003eCheck voltage at ballast. Check for \n              possibility of current or voltage surges which can damage arc Voltage \n              tube or seals or burn up connecting ribbons inside outer tube. Check \n              for shorted capacitors and replace ballast if shorts are found.\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e3. Reflector Problem \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"246\"\u003e \n            \u003cp\u003eReflector design may refocus radiant \n              energy directly on the arc tube or other parts of the lamp causing \n              overheating. Limits for allowable voltage rise due to fixture effect \n              are listed in High Pressure Sodium Engineering Bulletins. If this \n              is suspected, the luminaire should be tested in a laboratory. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd height=\"50\" valign=\"TOP\" width=\"250\"\u003e \n            \u003cp\u003e4. \"Glow State\" Operation \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd height=\"50\" valign=\"TOP\" width=\"212\"\u003e \n            \u003cp\u003eUnder certain lamp and\/or ballast operating \n              conditions, lamps will go into a partial discharge (dim glow) which \n              will darken arc tube and cause short life. Replace lamp and check \n              ballast. \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n\u003c\/table\u003e\n      \u003cdiv align=\"center\"\u003e \u003c\/div\u003e\n      \u003cp align=\"center\"\u003e\u003cbr\u003e\u003c\/p\u003e\n      \u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003ePROBLEM \n        8—DIFFERENCE IN LAMP COLORS\u003c\/span\u003e \u003c\/p\u003e\n      \n        \u003ctable bgcolor=\"#FFFFFF\" border=\"0\" cellpadding=\"7\" cellspacing=\"1\" width=\"685\" class=\"bordered-left\"\u003e\u003ctbody\u003e\n\u003ctr\u003e \n          \u003ctd width=\"250\"\u003e \n            \u003cp align=\"center\"\u003ePOSSIBLE \n              CAUSE \u003c\/p\u003e\n          \u003c\/td\u003e\n          \u003ctd align=\"center\" width=\"650\"\u003e \n            \u003cp align=\"center\"\u003eCORRECTIVE \n              ACTION\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e1. Normal Maintenance\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"224\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eIn addition to the normal decrease \n              in light output or brightness, a color shift can occur as lamps \n              age. Spot replacement of failures with new lamps may show very noticeable \n              differences in lamp colors. A group relamping program minimizes \n              this problem.\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e2. Wrong Lamp Color\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"224\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eCheck etch on lamps which appear different \n              to see that they are actually the same color. Replace with correct \n              color lamp.\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e3. Range of Manufacturing Tolerances\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"224\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eDue to tolerance ranges from manufacturers, \n              slight differences in color can be corrected by grouping those of \n              similar color.\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e4. Variations in Luminaires\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"224\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eVariations in the surface or finish \n              of the reflectors and\/or lenses can introduce color differences. \n              Interchange lamps to check on possible luminaire differences. Dirty \n              fixtures can also create differences, emphasizing the importance \n              of adequate maintenance.\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e5. Variations in the Environment\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"224\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eIn common with luminaire variations, \n              color differences in ceilings, walls, floors and furnishings as \n              well as other sources of illumination in the area can affect the \n              appearance of the lamp color.\u003c\/span\u003e\u003c\/p\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e \n          \u003ctd align=\"left\" valign=\"top\" width=\"250\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003e6. Faulty Capacitor\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n          \u003ctd valign=\"TOP\" width=\"224\"\u003e \n            \u003cp\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt;\"\u003eCheck capacitor rating to specification. \n              Measure capacitance to specification, using capacitance meter. Replace \n              capacitor if necessary.\u003c\/span\u003e \n          \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e","products":[],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0682\/3726\/3048\/collections\/apixjd7at__07316.jpg?v=1752657995","url":"https:\/\/plumlighting.com\/collections\/how-to-troubleshoot-your-hid-bulbs.oembed","provider":"Superior Lighting","version":"1.0","type":"link"}