UVB?

[treefarmercharlie]

View attachment 134508

Got a couple of these to try out on my hlgs running a separate timer last 6hrs a day at 15 min intervals to ease them into it. Seems the reccomend run times are different possibly due to fluorescent vs LEDs.

That looks like a tiny grow room you have there

 

[Vegabom]

how many hours of uvb would be sufficient in the later part of flower? I going to get this soon. Would a 23 w reptile bulb work?

 

[Greenthumbskunk]

Who’s running it and how do you run it?
Notice any difference?

Been running these for a couple years now

HLG 30 UVA SUPPLEMENT

Waterproof 30 watt UVA LED BAR designed for 12 hr. cycle in a 4' x 4' or 5' x 5' space. Passive cooled, 24 inches in length with built in power supply. Bolt on installation for any HLG 550, HLG 600 Rspec®, HLG 650R, Scorpion® Rspec®, and Scorpion® Diablo.

horticulturelightinggroup.com

Don't know about a difference in frost or thc levels being up. I bought it more or less to control any mold or bacteria I might get. Haven't had any so I guess it works

 

[Greenthumbskunk]

View attachment 134508

Got a couple of these to try out on my hlgs running a separate timer last 6hrs a day at 15 min intervals to ease them into it. Seems the reccomend run times are different possibly due to fluorescent vs LEDs.

I have the same lights and same set up. I have my lights wired up on a sunset sunrise feature. The UV running 6 hrs a day as well