Don't worry so much about those numbers, but look at the
actual spectrum. Figure wats of light per gallon. You want
3 to 5 wats per gallon. 3 being low, 5 being where you
want to be for stonys,and even higher like 6.6 is good.
And metal halide is the best light.

Wayne Sallee
Wayne's Pets



Timcat wrote:
I have a puzzling question. In researching lights to set up a new tank, I
can't find anything relating Fluorescent tube wattage and MH wattage to
lumens, or a comparison to incandescent...like you always see on CF tubes
for home lighting, i.e. 20W CF equals a 100W incandescent bulb. I'm
wondering if, for example, 500W of CF lighting has the same output as 500W
of MH. Am I making this clear? Am I talking apples and oranges here, or am I
missing something?

Tim