Will be used approximately 4-5 months when properly installed. Then it didn't work. I'm not sure what went wrong with him. More than a little disappointing. I never contacted the company as it was outside of the returns window so I can't speak to customer service or anything. I really wanted it to work because Fulham seemed like a solid brand. Too bad. For full disclosure I will say that the light was left on and hooked up to an analogue timer. The previous ballast, on the same fixture that installed this as a replacement, only lasted about a year with some modifications. The lamp also had two different bulbs for the required use. So I'm not sure if this is related, but as far as I understand it shouldn't be a problem.
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