UVB BULBS

[stinkyattic]

Geez zcomp. You DO think of everything, you and your door trigger. Very nice. high five.

[Zcomp]

Well I can't take credit for the idea(found it while I was researching the subject). But I'll take the high five for implementation.
For everyone else remember, when you purchase these bulbs, the manufacturer thinks that you'll be looking at this light through glass. Glass filters almost all UVb. They aren't guaranteeing your safety staring straight at the bulb. You wouldn't stare at the sun would you? no you'd wear glasses. Also your eye's aren't the only worry, your skin gets very damaged from UVb. were talking skin cancer here. If you can't rig up the switch, please place them facing away from where you enter and shut them off the instant you walk in.
I'm just trying one 5.0 bulb to see. then if it works, I'll see if I can/should add more.

[stinkyattic]

I've merged these threads to get all this neat info in one place.

[Zcomp]

The more I read into this, I'm finding that, you girls only accept UVb until trichs start going amber. possibly that UVb is what causes ambering of trichs. I'm reading that HID bulbs put off some UVb as well. MH more so than HPS.
This is all conjecture so see what ya'll can find. Since glass filters UVb, I've taken my glass off my HPS. Anybody think this could be a mistake?

[sd6515]

I don't have glass on my 400w HPS but I have great circulation and ventilation and my 2nd round under that is going great with no problems, I have a fan blowing directly across the bulb as when as circulation and ventilation.

No problems here though.

[qdavid]

I've got this sativa dominant strain finishing up. It's in it's freaking 9th week of flower and not done. Sativas are so freaking slow. So I put in this black light bulb for the hell of it. They began to really stank and the trichs are huge. I don't know if that was it as it's about that time anyway. But cool.

[Zcomp]

Yeah, I got a sativa dom. that takes almost 13 weeks. I blame the genetics and superthrive, which I just learned will extend flowering.
Black light bulb huh? does that put out comparable UVb? I hadn't really thought about them since reptile bulbs scream about there UVb. I hope black lights don't put out UVb, I've spent too many raves staring at the black lights. LOL

[klondike_bar]

lol i dont think black lights have much, since theyre always debunked for thier use in growing.

TY for the merge, i noticed on the weekend we had two uvb threads

[klondike_bar]

"These black lights for reptiles are NOT the black light tubes used for lighting fluorescent minerals, posters, and psychedelic paraphernalia (often called BLB lights). Fish/aquarium and plant 'grow' lights, either incandescent or fluorescent, do NOT produce UVB. You need a black light which emits light in the 290-320 nanometer range."

there we go, and off a reptile site too.

wonder if you can buy leds in that sprectrum?

[Zcomp]

Yes absolutly. Led's can be configured for any(subjective) exact nm. Thats what makes them so interesting to growers.
I have some nightlights on my aquarium that are led, I'll check there nm and get back to ya.