Black light for thc content?

[Newcomer94]

So I have done some research here recently on black lights providing extra thc and CBD in the flowering stage? Has anyone experimented with this and seen a noticeable change?

 

[mysticepipedon]

There is some controversy regarding whether UV light increases THC. I have a couple of t-5 "lizard lights" in my tent.

I used them for a few grows, then DIDN'T use them for a grow, and it seemed the grows that got UV were a little more potent. But the reality is there could have been some issue with the grow that caused it to be not as potent, I was basing the difference on memory, rather than a side-by-side comparison, and it was only a single instance.

I've never heard of anyone using "black lights." I would go with something made for exposing living things to UVA and UVB light, like lights for cannabis or lights for lizards.

 

[Newcomer94]

I have four LED black lights in my grow we will see?

 

[7munkee]

I have 2 cfl black lights and I was wondering the same thing. 320- 400 nm is outside what we normally consider photosynthetically active. Only I was wondering about using them during lights off phase while flowering.

 

[NorthernOrganics]

I have 2 cfl black lights and I was wondering the same thing. 320- 400 nm is outside what we normally consider photosynthetically active. Only I was wondering about using them during lights off phase while flowering.

Don't do this.

 

[Blastfact]

I have 2 cfl black lights and I was wondering the same thing. 320- 400 nm is outside what we normally consider photosynthetically active. Only I was wondering about using them during lights off phase while flowering.

If your going to use UVA or B only have them on when the main lights are on. Never during dark period.

 

[Newcomer94]

Don't do this.

Don’t do it because the plants need sleep and black light is still light