4x4 space. Its a tent, I have about 6.5ft of overhead space to play with. plants are about 4 weeks old

q: should I be running a dimmer? or 18-20 on full juice

thanks for your help

hi all, brand new so forgive ignorance. built a light with 4 qb132's driven by hlg-185h-c1400b and 4 qb120 driven by hlg-240h-2100b. I'm not using any dimmers. currently have plants about 18-20 inches from light and I'm seeing some signs of light stress (curling leaves-- not burning yet though).. an...