[odin]

I have a 35 watt hps and a 50 watt hps. I know a friend that has a 70 watt hps. Just my 2 cents are that they make tiny hid that put out almost no heat and alot more usable light than any cfls. I do use cfls for side lighting under the 50 watt though. I use circular tube flouros over my bubble cloner, then they go under a coated 35 watt hps, until they get used to the bright light and soil. Then they go under the 50 to veg. I think cfls are good to add some white or blue light as side lighting. But for 30 bucks you can get a 35 or 50 watt hps, which takes almost no electricty and makes almost no heat. Better choice over the cfls I think.