Quote Originally Posted by bejay
a standard 400 watt hps bulb will put out 50000 lumens initially it will drop some with use wich is why it is changed out well before the end of its life span, you have the same problem with flouros they lose lumens with use also so dont think you have any advantage by using flouros instead of buying one bulb to change out in your hps, you will be buying however many flouros you may have to change out to as maintence, well before they burn out just to keep the lumens up.
thats basically the conclusion i finally came to. cept i found a nice 600w digital HPS-MH combo with bulbs, reflector, and 15' cords... problem is its 300 miles away, it'll have to wait for a road trip i guess.