Chow_13answered grow question 3 years ago Its hard to determine but you should be safe at 60 cm. LED's vary in how bright they are. You would have to let us know what brand/model you are referring to. Is it 300 true watts( pulls 300w from the wall). Is it a cob light or burple ( blue/purple ) light, quantum board. Just a warning, I would not have more then one plant in the same pot at a time. The will compete and bring each other down. A lot of energy will be wasted fighting for root space and light. I would either separate them or select the strongest and kill off the weaker one.
