The Growery
Active Member
Seems to be a controversial subject, can't find any solid amount of data for either side. anyone have personal experience using these bulbs? are they worth it and where is a good place to get them? thanks!
anyone use UVB bulbs?
- Thread starter The Growery
- Start date
polyarcturus
Well-Known Member
yes it can be worth it, best location would depend on the UVB light source, if flouro, side lighting would be best, if mercury vapor(both are reptile bulbs from pet stores or websites) up with the main lighting so the spectrum's can blend.
The Growery
Active Member
you recommend running uvb during whole flower cycle or just a specific part of flower cycle?
hotrodharley
Well-Known Member
UVB is recommended mainly, in my experience, to boost THC production the last few weeks of flowering. Polyarctus would know for certain.
Rrog
Well-Known Member
I use the MH reptile lamp for the UV-b. I start it during veg. I read a paper a few years ago which led me to believe there may be some relationship between UV-b and the fundamental precursor molecules used to eventually make THC. These early molecules start getting made in veg. So given the little heat and I could give a crap about the electricity associated with one lamp, I run the lamp from veg through chop.
I set the timer for 15 minute bursts, centered around high noon, for a total of 2-3 hours a day. I'd be interested in any data that showed more or less time with UV is good. I know that some feel a single 15 minute burst is sufficient, but what's that based on? Anecdotal evidence is good, but this topic lacks solid lab data.
I set the timer for 15 minute bursts, centered around high noon, for a total of 2-3 hours a day. I'd be interested in any data that showed more or less time with UV is good. I know that some feel a single 15 minute burst is sufficient, but what's that based on? Anecdotal evidence is good, but this topic lacks solid lab data.
The Growery
Active Member
good info man, gonna pick up a few bulbs and have a go with it. I'm in the same boat as you, a 100 watt bulb is negligible when you run 5-6k of equipment.
Trichyn9ne
Well-Known Member
I've used the cmh bulb now for a few veg cycles and just recently flowered the first 3.5 weeks under the cmh bulb...if you'd like to see the results so far check out the fat purple grow on thread!!! All the pics I posted were plants vegged and flowered under the cmh up until 3.5 weeks into flower.
420God
Well-Known Member
I run a reptile UVB 10.0 the whole time the lights are on in flower.
~~~> https://www.google.com/shopping/product/14408437593861970789?hl=en&safe=off&client=firefox-a&hs=wv3&rls=org.mozilla:en-US:official&sclient=psy-ab&q=reptile uvb 10.0&oq=reptile+uvb+10.0&gs_l=serp.3...48694.50473.1.50853.5.5.0.0.0.0.111.522.1j4.5.0...0.0...1c.1.0sDmMQzdnr4&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.1355534169,d.aWM&bpcl=40096503&biw=1680&bih=935&sa=X&ei=a4LgUNmJO4muqQHhoYA4&ved=0CHQQ8wIwBA
~~~> https://www.google.com/shopping/product/14408437593861970789?hl=en&safe=off&client=firefox-a&hs=wv3&rls=org.mozilla:en-US:official&sclient=psy-ab&q=reptile uvb 10.0&oq=reptile+uvb+10.0&gs_l=serp.3...48694.50473.1.50853.5.5.0.0.0.0.111.522.1j4.5.0...0.0...1c.1.0sDmMQzdnr4&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.1355534169,d.aWM&bpcl=40096503&biw=1680&bih=935&sa=X&ei=a4LgUNmJO4muqQHhoYA4&ved=0CHQQ8wIwBA
fattiemcnuggins
Well-Known Member
Supposedly this dual arc lumen8 has uv-b but their website was not convincing.
polyarcturus
Well-Known Member
just reptile bulbs.
anyways i run my UVB lights all 12hours from the start of 12/12 to the finish, i use a mercury vapor. the idea, is the sun emits UVb almost all the time, emulating that will not hurt thing unless your overdoing it anyways.
a lot of people likr to claim 2-4 hours a day or 2-4 at the end of flower while on the other hand to get the full benefit UVB has to offer you should start hitting the with the rays as soon as you put them in flower this will prevent something like adding UVB from causing a shock late in flower or the buds not being able to handle the light and burning up.
polyarcturus
Well-Known Member
here is the best theory to date on UVB and THC relationship
http://www.youtube.com/watch?v=lfiI78uN3Ks
http://www.youtube.com/watch?v=lfiI78uN3Ks
fattiemcnuggins
Well-Known Member
I was running one of those light therapy lamps with the cover off, can never remember the name od the company. Daylight solutions or something. Seemed to add frost, at least my buddy seemed to.think so. Lachrel where u at? Lol
Rrog
Well-Known Member
polyarcturus
Well-Known Member
well those will work but heres the DL with those and why growers don use them
A) slightly out of spectrum usually run closer to the UVA(290nm+)spectrum with a much narrower band of the UV spectrum.
B) musch light the reptile fluorescents they have limited penetration, although more than the reptile fluorescents.
C) cost of bulb and fixtures is extremely high.
(all those reasons could be applied to suntanning bulbs also, except, sun tanning bulbs, run even wider spectrum of uv and a lot more UVa than anything)
Huel Perkins
Well-Known Member
Bringing this thread back from the dead.
I've been doing a bit of reading on uvb and trichome production lately and have really been considering adding about six 26w cfl's to my room for supplemental uvb lighting. I already run roughly 200w worth of cfl's that I hang directly down into my my canopy to help out the lower bud sites in addition to 2000w of overhead hid lighting, I'm wondering of swapping out a few of the cfl's I have for 10.0 uvb reptile cfl's would make a noticeable difference.
I've been doing a bit of reading on uvb and trichome production lately and have really been considering adding about six 26w cfl's to my room for supplemental uvb lighting. I already run roughly 200w worth of cfl's that I hang directly down into my my canopy to help out the lower bud sites in addition to 2000w of overhead hid lighting, I'm wondering of swapping out a few of the cfl's I have for 10.0 uvb reptile cfl's would make a noticeable difference.