Are UVB bulbs useless for cannabis?
- Thread starter Major Tom
- Start date
luvvin growin
Active Member
yep,pretty much due to the wrong spectrum of light and the heat they produce.
luvvin growin
Active Member
stick with MH,they do the same job for less money in elec.
luvvin growin
Active Member
good to know,most uvb I've worked with are for extruding heat for reptiles and such,thanks for the info.
nellyatcha
Well-Known Member
uv bulbs have a certain material that mimics the sun just like if you look into one it can blind you right off the back so dont look into them but yea the only problem is , is that you have to add spectrum and uv bulbs use the same amount of watts it say as for some bulbs they dont
luvvin growin
Active Member
k,got it and thanks again.Now I know...............and thats half the battle.
I would put them on there own timer and be on say 5 hours of the 12/12 lights on. say 4:30-8:30 of 12 hours, starting at 12AM
And in that time stay out of the grow room for your own safety.
jcdws602
Well-Known Member
I only use my repti glo the last 2 weeks of my grow with my 1000 watter.See they increase resin production by stressing the plant with Uv b rays but in turn will effect overall yield because the plant focuses it's energy in increasing that gooey resin like sunscreen to protect itself instead of increasing mass.So I wait until in my case a week after 7th week explosion and then turn on 5-6 hours all the way to the end.