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Old 24-04-2006, 06:26 PM posted to rec.aquaria.freshwater.plants
John Sankey
Posts: n/a
Default "watts per gallon"

"Try 70-90 lumens ... for most FL's."

My original assumption was a bit lower than that. However, when I
started checking with local aquarists, I discovered that most
were running 18-24" T12 lamps which are less efficient even when
new. I also discovered that most replaced their lamps only when
they failed, which cuts lumens further by typically 20%.

Hence my request for real data on a broader scale than one local

"(a poor measure of PAR BTW) "

I agree - see