I've got a grow right now with a 90W LED light (round one) - from Eufala - it was 8 weeks into flowering friday sept 18, 09. the buds are nice, stinky, but the leaves look like they're missing something. They are in dirt, 5 gal bucket (not sure if they're root bound or not) I'm waiting till their done to decide if I'll try an HPS 250 W - my area is small - 3'x3'x7' - power usage and heat signature was my reasoning for the LED, but I hear that a 250W HPS isn't all that hot or use much power and will fit my room size perfectly. 1 good thing - I have 2 rooms - a veg & a flower - both the same size with CFL's (4 - 42W, 1 - 28 W???, and the LED(2 of the 2700K 42w are with the LED) - , 2 fans, 1 air & water pump, and our bill didn't go up at all - it went down less than a dollar!!! I will add to this in a week or so when harvest is done and report how it is.
later