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Grow QuestionsHow long to run uvb and where in the 12 hr light cycle to use it?

How long to run uvb and where in the 12 hr light cycle to use it?

Southofheavenstarted grow question 3 years ago

Hey folks, ive got a t5 24watt uvb bulb putting out nm at 270 to 315, in previous grows i was having this on for 2 hours in the middle of the light cycle each day for the last two weeks of the grow. Part of me is saying thats too long, your thoughts? Cheers

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Rusticbudsanswered grow question 3 years ago

I have uv in my sp250.. how many watts the two or three chips put idk, but they are on all the time. If you are concerned about leaf damage you could put the uv higher then your other lights. I know indoor is different but naturally they are bombarded by uv all the time so one would think they could definitely take more then 2 hours of uv.

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