One Source For All Your Replacement Lighting Requirements
One Source For All Your Replacement Lighting Requirements
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When should I replace my Fluorescent lamps or HID lamps?
All arc source lamps have a rated lifetime which is based on a combination of the number of hours of operation and the number of starting cycles per day. As the number of starting cycles per day decreases and operating or "burn" hours are extended the lamp life rises and the inverse is true if the number of start cycles per day increases along with a reduction in the burn hours and cooling periods between operating hours the lifetime of the lamp will decrease. The rated lifetime for all arc sources is the failure point for a predetermined number of lamps within a statistical valid sample. This means that all arc source lamps should be tracked by hours of operation and replaced prior to reaching the published rated life threshold. There are significant benefits to changing lamps prior to end of life including reduction in the maintenance costs for the ballasts and power supplies as well as an increase in light levels because all arc source lamps become less efficient at converting electrical current to useful light as they age. Conversely, leaving arc source lamps in fixtures when they have failed or are "cycling" (igniting then going out) will impact the service life of the ballast and power supplies and in the case of multiple lamp fluorescent fixtures may well cause the failure of some or all of the additional lamps.
Common causes of lamp failure for arc source lamps beyond the age of the lamp are "hot installation" and ballast failure. Installing a fluorescent, metal halide or high pressure sodium lamp into a circuit where the electricity is still on will definitely shorten the life of the lamp if not cause the lamp to fail immediately. If the ballast has failed in a fixture it will often cause lamp failure as well. Unfortunately, the problem may not be obvious until a new lamp is placed in the socket and it fails to light or begins cycling. Please be aware that the failure rate at the manufacturing level for all light bulbs is less than 1 percent so the most likely cause of lamp failure other than normal usage is generated by the fixture or electrical system. We are always available to evaluate your lighting problems and we will attempt to provide the best options for solving the issue.