100w blurple for the first few sets of leaves, then i put her outside, so was only getting a few hours of direct winter sun. the next few seeds i've just popped are under the blurple again but i've added 100w of strips, ~200w if i get around to adding some heatsink. the driver is only good for 185w. i've also got some cree cxa2440 (i think) that ive put on an old cpu heatsink with fan, and i can run that up to 40v and 1.8 amps, so I'll add those sometime. i use an old laptop charger that outputs 20v, and an ebay buck boost converter to step up to the 40v, so it's a pretty cheap 70w light. I have 4 led cobs and 4 strips to play with but not much space. I'm mostly tinkering til spring comes and i can get some outside.