mycomaster
Well-Known Member
The hlg550 is a great light, I can't say enough about it. The hlg550v2 from growerslightsource.com is a whole other beast. Besides more samsung diodes, it has a much better heatsink, and the external potentiometer is really nice. If you want to grow with quantum boards, hit up growerslightsource.com, and save yourself some $!
