Join Date: Dec 2012
Location: Southern Maryland
According to the PAR vs Distance for Various T5 Light Fixtures chart on the first page, the AquaticLife T5HO 36" 4 bulb fixture has about 90 PAR at 25 inches.
Is it safe to assume that the same fixture with 2 bulbs has about 45 PAR at 25 inches?
I have glass covers on top of my tank and they build up quite a bit of condensation.
How much will the glass/condensation on the covers reduce the PAR of a light?