I assumed that when they said that the unit had two 40 watt bulbs that they were "real" watts and not "incandescent equivalent" watts. I can't find this explicitly stated however. Interestingly the aquarium guys don't seem to care about lumens.

Anyway, if it really does have 80 watts, it would be the equivalent of four of the 2' 20 watt fixtures, AND it comes with reflectors, making it quite reasonable in comparison. Still dunno about the various wavelengths tho.