[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: T8 efficiency vs. temperature
> One other question. The double fixture has an inside
> covering of mylar and sits directly on the glass.
> Will the bulbs run cool enough to be the most
> effective they can be?
Ivo Busko wrote:
According to a data sheet from Sylvania, a T8 bulb operates at 100%
efficiency between 22 and 27 C. At 30 C, efficiency drops to 97%, at
35 C to 91 %, and at 40 C to 85%. That's a lot. I'm thinking of using
a Radio Shack probe thermometer to check the air temp within the light
That is one of the reasons that T5s are better for aquariums. They are
optimised to run at 35 C.