Check out Major Tokes grow journal. If you are asking about a 500 watt or better halogen light for a grow, I would question weather you could possible know everything you need except for the lights. $100. bucks ya right lol. VV

How many lumens shoud the bulbs have per plant? I have a bulb that has 1530 Lumens is that okay??

never too many just keep the heat under control

What is a Compact Floro (CFL)?

Originally came out as those energy saving light bulbs as bright as a 75 watt bulb has wierd spins or loops to it

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"You Can't Weed Out The Weirdos"

For all of those that are trying to figure out how many cfl's to use, I defer to the master. In his great book, "marijuana Buds For Less", the author SeeMoreBuds explains with pictures and text how he used 8 42 watt cfl's to grow 8oz of bud from 3 female plants. I'm gonna go out on a limb here and say you could use 8-42 watt light to grow three plants. VV