OK say that 5 times really fast
Anyway, I was wondering about PC lighting, in house hold fixtures, they say a 13 watt PC equals a 40 watt incondesant and so forth. Does this too apply to PC lighting for reef tanks? If so, this confuses me as to how much light to get as the rule of thumb of 3 watts/gallon for low light, 5 watts/gallon for medium lights ect. goes out the window. My brain is now numb trying to figure this out, any advise??