DE 630w CMH

[Toker1]

Has anyone tried this bulb (detailed in subject line) out?DrPhoton any input? I’m thinking about switching out my DE 600w MH/HPS for this bulb.
I’m guessing I will see increased oil production, faster veg growth, but a decrease in overall yield of dried smokable flowers?

[DrPhoton]

Its about the same as MH/HPS. I would recommend them to new growers or growers willing to simplify their system. However not to exhisting growers.

[Toker1]

Got it! 👍
So it seems like I would be better off getting one of those UV lights that go in the T5HO fixture. I got a few of those fixtures laying around somewhere.
Maybe add that as wall side lighting?
I’m just looking to boost my oil production.
Is there a specific distance the plants need to be away from that UV bulb?
And how many hours per day should I stress them with that type of wavelength, I’m thinking 3-4?

[DrPhoton]

Its typically used in the last 2-3 weeks as it has been known to reduce the photosynthesis in leaves. And so you must find a balance between resin production and yield. As how long you use UV for will affect both. Some products are either made for or recommended by manufacturers for cannabis and so should look for those that do. As they will likely produce the wavelength (UVB) that is desired and sometimes provide their recommended operating instructions that work well with that specific product.

[Toker1]

Right. So I was thinking last 2-3 weeks to turn on for 4 hours during the middle of the lights on cycle.
I was thinking a 6” air gap between sidewall UV light and plants.
I was looking at this...

https://www.htgsupply.com/products/agromax-pure-uv-t5-bulb-4-foot

So you are saying there are lights that are commercially available that produce uv-b...I assume they also produce UV-a at the same time (like the one in the link does)? Or is there a product you know of that only produces UV-b? Is that even a possibility?