UVB in conjunction with HPS?

i read somewhere about an experiment where a few UVB bulbs were used in conjuction with HID lighting. clones were grown at the same time in isolated environments with all controllable variables eliminated aside from supplemental UVB bulbs added in one of the grow spaces. apparently, the buds from each grow looked, smelled and smoked the same, but the plants growing under UVB lights (desert reptile bulbs from a pet store???) had a much higher THC content.

has anyone tried this? bullshit? or worth a shot? they're like 20 bucks a bulb for little 20w CFL's. seems kind of pricey....

I haven't tried it, but i've read about some of the experiments people have done with UVB, and it seems to do the job. In a side-by-side comparison of UVB vs none, the UVB treated plants had visibly more trichomes and were reported to be more sticky and stronger smelling.

My understanding is that it does stress the plant though, and should be used with care. I don't think it would be a good idea to run a 10.0 UVB bulb for more than a few hours per day, and it may be a good idea to split that time into several on/off intervals. I have also heard that you should keep the bulb at least a foot away, unlike normal CFLs.

It's something i've been meaning to experiment with myself, since the reports I have read seem pretty convincing.

ive read a lot of posts like this, and posted a lot myself about this ill tell you this:

Well there is a special bulb from sunpulse. A pulse start. it's the 10k one i believe. Even if people dont want to try their bulbs, i would love it if some people grabbed the 10k UV one, id love to get some more opinions on it. I also found some interesting threads about the bulbs too if you search around you can find em. Here's the makers sites.

http://www.lifelighttec.com/
http://www.sunpulselamps.com/index.p...tpage&Itemid=1

And here is something else i found. Last time i posted about this bulb, like a year ago, it stirred up a lot of shit lol

I thought you might be interested to hear this info on Sunpulse. They've been working on these since 1999!

These are nothing to do with "Sun Master" - these bulbs are totally new - they have been engineered right from square one, designed for horticulture - not a re-packaged street-lamp!

I believe they are releasing 4 types of Pulse Start Metal Halide (PSMH) bulbs in the UK.

3K, 4K, 6.5K and 10K.

4K is for seedlings / cuttings and for last week of veg.
6.5K is for the majority of veg.
3K is for flowering.
10K is for the last week or so of flowering.

It's the 10K bulb that's going to cause the biggest stir.

The 10K bulb has lots of UV. It's basically a "death ray" which causes the plant to stress and produce lots of resin.
Resin is basically nature's sun screen. UV fluro tubes don't have the same effect because they are not powerful enough to get UV incident energy to the leaf.

I have spoken to growers in Canada who have used the 6.5K and 10K. These guys have been at it for 20 years, they know their genetics, and they were astounded
at the frostyness!