I've grown since BLED... before led.... today's high end leds can compete head to head with cmh, hps, mh... that being said, each seems to bring forth their own turpine profiles in the same strains.
Now were talking COB or quantum boards here. I don't like active cooling led lights. Fans are one more thing to break and cause a major issue. And if designed correctly, fans are not needed.
Most of the cheap lights will have epiled chips, 5w or 10w... they'll take 100 10w chips and call it a 1000w light. That's deceptive marketing as far as I'm concerned, and I move on.
Check out cobshop for single cob units, you can add on as you can afford.