Quantum’s boards and cobs use same technology....
Did you downgrade on watts with cobs...
Is was listed somewhere like a 400 cob is equivalent too a 600 watt hps.
But the main benefit is like ypu can run 2400 coblights and generate 600 watt hps heat.
Basically cobs generate 25 percent less heat which is cool,
Great option for a stealth grow in a insulated shed lol......
2400 watt cobs with 9 water farm buckets, 2400 grams if per watt. Probably get more...