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Re: T8 vs T8 efficiency
>Had been using three full-spectrum T-12's previously. 24" 5000K bulbs
>were harder to find & more expensive ($12.50 a pop) than the 48" bulbs,
>but that's because my lighting supplier had to get 95 CRI tubes instead of
>the usual 75's.
That might be part of the reason. The bigger one may be that 4' and 8'
lamps are mass-produced for the commercial lighting industry. Anything else
is made in much smaller quantities, hence a higher unit cost.
>the tank lid for feeding now. I think I need to do an efficiency study
>that includes the ballast in the power consumption...
Definitely, the ballast has a LOT to do with lighting efficiency. There are
three factors--the lamp's energy consumption, the ballast's, and the
ballast factor. The last is how the ballast works with the lamp.
---------------------------------------------------
Greg. Tong
gtong at sirius_com (delivered by Cyberdog)
San Francisco, CA, USA
"Every infinity is composed of only two halves."