spectrum

Last few days I'm thinking if I was maybe using "wrong" light for rooting and thinking how to improve energy efficiency in VEG/CLO room. This is what I am using now: Osram T8 so called flora "color 77" but the 1.2m one that is 36W There are 90 clones under one light in a 5 x 18 layout. I...

Has anyone had the chance to deep dive and explore differences in photomorphenesis relation to production of different cannabinoids ? Or main group CBD / THC .. Some research show increased production of THC relative to concentration of UV-B. I'm mainly interested in knowing if someone have...

So I make my own LED's and I"m looking at starting my own company. I just got my spectroradiometer and I thought I'd share the data I gathered from my flower room, veg room, and a a 600w HPS. The first image is a screenshot of my flower spectrum, second is my newest veg spectrum, and last is a...

Help!!! Running 600watt LED with 3 button red,White, Blue spectrum. All is great and started the 12/12 flowering cycle.. Which leads to my question. Do I continue to leave all 3 light spectrums on?? It seems every YouTube video I have watched the lights seem very red, do I flip off the white or...

I've been a lurker on RIU for a few months, soaking up as much information as I can. During this time frame I've built multiple grow concepts, re-built them, and now have one completed harvest under my belt. I'd like to thank the members of the forum for their contributions to my success...

Just starting this thread cause of all the clutter out there. I'll be posting my questons here. You are welcome to answer with fact, opinion or both, I even welcome speculation. Just give your reasoning, if you insist on just posting your opinion or information I will simply press ignore...

Hi, spent last couple of days reading up on UVB addition to grows - some people seem to recommend and are getting good results will agree that there doesnt seem to be any clear data or experiments (maybe there are but i havent seen them yet) Im thinking of going with these UVB200 26w bulbs...

Ok so I'm planning to start growing when its legal been wanting to do a 1k+ light setup for a while since i left California in 2012 and maybe ill finally have the chance if this vote passes. So with all the research ive came up with these, Can you all take a look and see if i picked a good...

Helping a "Friend" with a Small medical Marijuana grow, under 20. What are the best #'s to have a custom lighting setup made. Led, have used to supplement HP's & Mh. Now going all out led

OK I'm growing in a small box, about 3.5' x 2' x 3'. I have four 42 W CFL bulbs on top and two small fluorescent strips on the side, I think they're 15 W each. My question is what is the best bulbs to use for veg and for flower? I think I have the daylight ones in right now and have been having...

Bought the sk400+ a couple months back. While I have to admit that the quality seems to be outstanding, yield just doesn't live up to the company claims of rivaling 1k hps. It may not even best my 600w hps. I haven't harvested yet so maybe I'm in for a surprise, but just by looking I seriously...

Hi guys, new to LEDs, currently plants are in veg but soon to flower. I have the growth light on at the moment. When going to 12/12 and after 10 days, is it best to have 1. Growth and Bloom lights on, 2. Just the Bloom light on, (save on electricity) 3. Growth and bloom both on and near the...