Sorry, these weren't the first ones we've installed. We've been installing them probably since about the time they were available at the supply house. Never had a failure yet........... If you install cheap junk, expect failures. I've had very little trouble with the linear flourescents I've installed. Probably the most trouble I've had is ballast failure in troffers. What's the warranty on the ballast of a troffer? One year, correct?
No. 3-5 years from date of mfg. Depending on the brand. Osram Sylvania is from installation if you register them together with OSI lamps.
Standard ballasts aren't supposed to run hotter than 160F and misapplication can cause overheating like air handling troffer used in non-air handling application or the area is just really hot.
GE and Advance are from date of manufacturing.
In the days of increasing permeation of LEDs, know your fluorescent system to stay on top of things.
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