"The 105w bulb puts out 6,200 lumens and is the fluorescent equivalent to a 400w MH and produce very little heat. Available in vegetative and flowering spectrums. Fits STANDARD household sockets and are compatible with most Compact Fluorescent Fixtures" above is the website description of some cfl bulbs i would like to purchase. what i'm confused about is the part that says that these bulbs are the "fluorescent equivalent to a 400w MH" i may be no expert, but i know that a 400w MH puts out a lot more lumens than that, so how exactly is this its equivalent? the opinion of someone more knowledgeable than myself would be much appreciated! happy toking!