hlg 550

Thread for the HLG 550 & 300 Images from seed to harvest, tips, questions, advice, things you’ve learned along the way. Maybe it can help others make a decision as to if this is the light for them as well. Happy Growing :weed:

i just bought a used HLG 550. i have an advanced platinum p300. I'm putting both lights in 4x4 tent. in 5 gal. smart pots. FFOF. blue amnesia xxl autoflowers. advanced nutrient suite (4ml/l) and cal mag (2ml/l). temp steady at 82f. not adding co2, but 6inch inline fan. IK people say 1g/w is...