UVb an experiment

:thumbsup:;):)

"One of the reasons mirrors are usually not recommended for use as reflectors, is that they reflect concentrated Rays resulting in hot spots."

No, we don't use mirrors because the glass eats usable light. Ive never had a 'hot spot' with a mirror - a flat mirror will NEVER concentrate a beam of light into a hot zone.

Any news about UV-B or far red supplemental lightning? Or Time factor?

Has anyone around here tried out the cmh bulbs? They seem very close to the sun's spectrum, - having both infrared and ultraviolet in addition to all visable as well as photosynthetic usable light. I wonder what the time factor is on that lightning, - does anyone know anything about that?

I have seen no new info....just fighting and arguing ..no red/far red grow log. I stated previously i would do a side by side HPS vs HPS/incan but the room i use now is unsuitable for that. i am 1/3 done building a new room,3 -6' x 3' tables in a 10' x 14' room will provide me with room for these trials but i am in not in the best of health so it's taking kind of long to get there , sorry. as to the CMH bulbs CAN'T get a grip on that time factor stuff but i've herd mostly good things about them[the bulbs]...the price is the big draw back.IMHO you can get the same spectrum with a mix of cheap generic HPS/MH.

Maybe you are right, - although, after what I read, the spectrum of a cmh are more equally emitted over the whole spectrum, and much less light emitted in the wavelengths which the plants don't need. But I am not going to make this a cmh thread, - just curious if anyone knows more about the time factor and how that translates into the spectrum of this lamp - and how to implement it in a pad-pal. Sorry about your health, - best wishes for recovery!
Hopefully this thread will get back to life, - some interesting subjects I think,- even if a lot goes over my poor head... :)

Peace

Not all Ceramic Metal Halide (CMH) bulbs are created equal. Only the Phillips RetroWhite 250 & 400 watt bulbs are worth messing with. They require a 250 or 400 watt HPS magnetic ballast. The smaller CMH bulbs require a pulse start MH ballast and are not worth the trouble...IMO.

If you have a 250 or 400 watt HPS magnetic ballast?...you can rock & roll with them. I veg with them for 30 days; flower for 4 weeks, switch to HPS for 4 weeks...then, switch back to the CMH for the final weeks to harvest. This seems to expand the buds...and are rock hard.

400 watt CMH/HPS/CMH works well for me...:thumbsup:

Hey Dutch,

I think that the CMH bulbs are great, the only limiting factor is 400w is the biggest size available. Hard to cover a 4'x4' tray with one, and two becomes a rectangular foot print, that's just not large enough.

My first "fogfgonugen" setup is using 2- TI Problooms per 4'x4' tray. (2 trays per setup) for a total of 4- Problooms and a total of 1320watts of LED. They are mounted on a light rail, moving just 2' each way and working out very nicely.

For the second fogfognugen setup, I went with 1000w SunPulse MH over each tray; using 3k bulbs for flowering and changing them out for the last two weeks to 10K bulbs. Excellent results, with out resorting to supplemental UVb. Both setups are on shelves, one above the other. Pretty impressive to see 552 "plantlets" of SOG all growing at one time. :thumbsup:

BTW for everyone; while I was gone I oversaw a side by side by side experiment that had UVb from start of veg to flower to finish, Uvb for just flower period and no UVB at all. We used 5 different strains and the results are interesting. I will try to post it all in the comming days.

Welcome back brah.

"BTW for everyone; while I was gone I oversaw a side by side by side experiment that had UVb from start of veg to flower to finish, Uvb for just flower period and no UVB at all. We used 5 different strains and the results are interesting. I will try to post it all in the comming days.
__________________"


Seriously?
Yer killin' me.

Gonna do like my grampa eh?
He'd pocket a pice of a picture puzzle, wait 'til da rest of us slaved over da t'ing.
Den jump in an slap down da last piece!
Funny guy.

OK, all t'ings considered, I'll wait.
'sgood to see ya.
Horse was worried.:D

Be well,
Wee

Hey Weezard,

You know what the ladies say about me......I'm just a big tease. :D

Hey all,

As I mentioned to DutchPimp before, we have a second "fogfognugen" setup now. To rush it into production we went the digi ballast and 1kw HPS route initially.
After two flower runs, when the bulbs needed changing I decided to try the PSMH (pulse start metal halide) from Sun Pulse. Bought 2- 3K bulbs for flowering and 1- 10K bulb to change out for the last week of flower. (the two 4'x4' trays are 4 weeks apart in growth phase on an aprox 8 wk flower).

Results are very impressive. Even tho the initial lumens out is lower then HPS according to a light meter (Sun Pulse does not list that spec btw), the flowering moved along better and the buds seemed to get harder. But the best part was the 10K bulb, it took clear trichomes to cloudy to amber (abt 25%) in that final week. So maybe we really don't need to be humpin' with UVb bulbs after all. :D

Side note: after doing some LED digging, I think the UV diodes in the TI probloom are closer to UVa then UVb. Could safer UVa be another answer to keep some of us away from UVb reptile bulbs?