Thanks man!
The COB fixture I got runnin next to the 600 is defiantly giving the 600 a run for its money, but the fixture I'm running isn't near the same so the 600 does produce overall bigger buds, but density is the exact same.
The COB fixture I'm runnin in flower is a cheap one I got on amazon. An Apollo Purple Sun, think it draws only 180 actual watts, so not really in the same ballpark of a 600w HPS, but like I said, density is the same and the temp difference is insane.
I just built my first set of COB fixtures with some Vero 13s for veg. I have 4 of them on two heatsinks, 300mA, 20w each fixture, 40w total. Replaced my two 100w T5 fixtures, that ran 200w total, and threw out a ton of heat. The COB fixtures literally have no heat.
I want to replace my bough COB fixture and my 600 with all vero cobs eventually.
I don't understand the LEDs very well still but I'm starting to get an idea. I know they work lol