Good point forgot about it being only florescent, silly watt per gallons rules should be thrown out, how about we just start our own new lumen per gallon rule? Just spent some time googling to find out if anyone's done the research for me leave it to the military
not saying the numbers are correct but I will trust them for now. The CFL's I bought are rated at 490 lumen, if trusting that chart my old 17watt T8 was at 1260 lumen so that means I have less light then before even with two(the only plus is these are at the right kelvin rating where my old one wasn't). Ok so to get to about 1 watt per gallon old rule using my 17 watt T8 as reference....
1260 lumen / 17 watts = 74.12 lumen per watt ( I know not the golden number, probably a little low)
36 gallons * 74.12 LpW = 2668 lumen needed
So I will roughly two 26 watt CFL's to get to my 1 watt per gallon equivlency of lumen not counting re-strike on the CFL's. Yikes those might get a little hot, let me get the dremmel out and cut some cooling slats.
Well for now I'm satisfied with the smaller bulbs because with at least the right rating my plants are finally showing growth. But will defiantly look into getting bigger ones in the future.
Thanks for reminding me oddity of rules in fish keeping... :D