Those buds look small compared to what I've seen and done with a 600w HID, not only that but look at how many LED's there are, thats alot of overlapping light and for the same amount of money it cost for those LED's you could yield twice as much with HID's. Cooling is not a big deal, an a/c is not expensive to run. My electric bill rises $15 a month for 1 5000btu window unit that runs 24/7, thats not alot of money. Even if I needed more a/c then I would obviously have more lights which increases yield even more. All I know is HID's work great and with the new
Adjust-a-Wings the LED's don't have a big advantage over HID's when it comes to cooling, because the
Adjust-a-Wings spreads light and heat evenly throughout the grow area alot better then conventional hoods. So maybe LED technology is advancing and one day it might be the future of indoor cultivation, but as of now the HID technology is good enough to be the most practical and high yielding units on the market today, for the cost.