Oh sorry i actually have Flood LED's rated at 110 watts each or 1200 lumens @ 5000k.
Definately over kill and i even purchased a dimmer but opted to gradually raise the lights over the past few months to the max hieght. This time i actually had to raise the whole fixture so we will see.
they are currently 3 ft above the substrate.
Drop checker Yellow and fish dont seem to mind at all. hope this helps