I have around 1200w on clu058 COB leds, they work nice, but I just reached around 1kg per 1200w with those COB LEDS, using MH and HPS I always get around 1.2kg and 1.4kg per 1200w, on the same working area and variables. that's why I rather use HID lights, for me works better.
It's nice to read...