my switchable 1000watt (currently using HPS) was $350, but you can get a 400watt HPS for $119 at HTGSupply. you talk about price, but my power bill is only $30 more with the 1000watt that i only paid $350 for...i read about the UFO light in high times, but i am beyond skeptical - especially for the outrageous price. speedhabit already stated this, but the amount of supplies you could buy with $1200 could transform several rooms into the PERFECT grow areas. theres alot of stuff to buy other than lights and things that use power, you could have made the sickest setup ever! with co2 and a light mover to grow a huge area! or a small area w/ hydro or anything else you could imagine!
the fact that you spent $1200 on something that grows comparable to a 400watt makes me raise an eyebrow..you talk about heat, yet in my tiny apartment 1 oscillating fan keeps things nice and ventilated. in my opinion, you should have invested the $ in something else - i see your 600watt outgrowing the LED.
im VERY interested in seeing the results, so make sure to keep us posted! i want to see what $1200 of LEDs will do, because even if it DOES grow similar to a 400watt - it would still be a ripoff in my eyes; heat/price/ballast+reflector are very easy to control - you could have bought an air cooled reflector for $85, that would have solved the heat problem - just add a fan for ventilation and bam, no issue at all. for small grows, your 600watt would be perfect - or a 400watt from HTG for less than $120. all in all, i think the price of the LEDs far outweigh the price youll save on $. maybe in 4 years youll save like $50, but i really dont see how this is a good deal.
im honestly not trying to bash your purchase, im just stating my opinion. im really interested in seeing what happens though, maybe in the years to come this technology will truly takeover the HIDs!