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4X65=260 Divided By 55 Gallon =4.73 Watts Per Gal.

Am I figuring this right 4.73 per Gal.

I read if I put two 15 watt on top of a 10 gal that I'll get 15 watts of light not 30 watts to get 30 watts i have to get a 30 watt bulb. does this relate directly with my 4 x 65 watt set up? Am I only getting 1.19 watts per gal. on my 55 Gal?
 

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4X65=260 Divided By 55 Gallon =4.73 Watts Per Gal.

Am I figuring this right 4.73 per Gal.

I read if I put two 15 watt on top of a 10 gal that I'll get 15 watts of light not 30 watts to get 30 watts i have to get a 30 watt bulb. does this relate directly with my 4 x 65 watt set up? Am I only getting 1.19 watts per gal. on my 55 Gal?
WPG assumes fluorescent T12 bulbs so the approximation that PC's are close enough holds. Now 30 W of fluorescent is a lot more light than 2 X 15W incandescent.
 

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The WPG rule? It'll apply on the 4x65W. It won't apply on the spiral screw-in CF bulbs because of the massive restrike and poor design of those bulbs. It also doesn't apply to incandescent bulbs because the rule is based upon fluorescent bulbs.
 
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