@sixstring2112 you seem to be having pretty good results with quantum boards. Is the difference in quality and yield vs. Cxb3590 worth shelving my cobs and picking up some qb's ? Not saying totally retiring my cobs, just giving them a little break.
quantums and cree and pretty much equal,but if you had shitizens i would def say park those and get some quantums ,how ya like me now doggy,ruff ruff
seriously though,quantums are great,cobs are also great.i think quantums are easier to build and get plugged in,no thermal paste or pads needed,no cob holders.cheap heatsinks,no heatsinks needed at low power.the square shape makes them super simple to build frames for,they put out a ton of light.but i wont stop using my cobs,especially the lower power fixtures.more testing needs to be done on the quality side with qb vs cob but as far as yields i think its a wash watt for watt.hard for me to tell though because all my quantums have cobs around them.i have not put quantums alone in a tent like alot of these guys have,so im prob not the one to ask on this.
Just Saying 
