I use eight CFLs above the one tree that I grow at a time, and four CFLs stationed around the tree. Still using a few older 42w bulbs but am upgrading to 55w and 65w bulbs for future grows.
Presently, I am in the flowering stage and, of the eight bulbs above the tree, five are 42w bulbs one of which is 6500k the others 2700k, each with 2800 lumens. Three are 65w 6500k bulbs running 4000 lumens apiece. Total lumens from above equals 26000. The four side bulbs are 55w 2700k bulbs at 3600 lumens each, or 14400 lumens total.
The cabinet has 40400 lumens.