Just got a 12 watt 440 nm blue, it's great. It's a lot larger than what I was expecting, the green 12 watt LED is much smaller. This thing is bright and almost purple, it makes a great party light if you want to spend a hundred bucks.
It's for being between two 125 watt cool CFL bulbs inside of reflectors, I think it should go great. If they were not so expensive, I'd get some red 660 nm just to see how they work on buds.
I've only seen good things from LED's, the tightness of a powerful HID but with the crystals of a CFL. It's just that they are not cheap, you would not want to get busted and have these taken away!
I don't think I like the UFO's myself or these other systems, although I have never seen one in person. It seems nice to have these and they are a tad heavy, they are made of metal around where the LED's are.
I also have no idea how to hang it other than those pull string sockets, just not exactly sure how I'm going to hang this. It's great for a night light to turn off the CFL's and have a very cool color to sleep with.....as well as additional light spectrum for a veg space.
This light puts out probably four times as much as a CFL and much more focused in not only the wavelength but also it's beam.