Now that's what im talking about redneck engineering, ala macguyvering shit outa fun and necessity!Are you asking if I have? Yep Mega Ray. I use a simple metal lamp used for chicken coops. Clamp that bastard where it needs to go.
Cool would like to read that thread. Here are a few others.I'd be interested in any links to "today's science" also. That's not sarcasm. I'd really be interested.
This thread had a very comprehensive back and forth and many studies were referenced. http://forum.grasscity.com/indoor-medical-marijuana-growing/336317-uvb-lights.html/page-10
UV light in invisable below 380nm or so. Most of those reptile bulbs contain phousphers that also produce visable light in that 6000K to 7500K range. They are better than regular bulbs because they have the UVB.These lights also give off a decent amount of visible light. They're almost on par of brightness to a 6400k T5. I've now added two of these in my Veg space as well that I just leave on 24/0 with my other light. Hard to say if I've noticed much difference in growth but adding them to my plants that were already about 2 ft and mature made them all show preflowers.
Some true humor for U today. I had the bulbs on wearing sunglasses in the flower room last week while working. I also have a military type haircut, as in very little hair.Never heard anyone claim increased yield before. I have only ever heard the exact opposite with too much / too intense UV-b.
I would tend to agree with the short exposures being enough to get the desired result. That's what I do.
Not sure what BS you speak about? Can you be more specific? It has been long understood that the resin, more specific the trichcome works as a sunscreen to sheild the plant from higher quantities of UVB. One reason plants grown at higher altitude usually are more potent then the same plant grown at sealevel because of the thinner atmosphere and higher quantities of UVB exposure. Think highland vs lowland in columbia or thailand. Or Afghanistan. Reports that even a few thousand feet can be more potent the higher you go. If you take the same clone of a plant this experiment can be and has been shown to be true.but that Grow Room video with "marijuana man" has some major BS in it... . He takes great liberty with some of the mechanism, including the label that resin is a defense of UV-b which it isn't at all in my mind.
Look at the date that book was published because the sun does not give bursts of uvb but an all day exposure. Also the technology of the light phosphors has only really advanced in the past 10-15 years for higher output over a large area. Have been doing UVB and seen the results on many crops. I leave mine on the entire flower light cycle with no adverse effects. Look at the lux strength and distance video for reference and exposure comparing shaded area to higher levels of uvb the closer you get. Hope that helps. It is understood genetics or different strains and breeding has the most effect however the extra UVB allows the plant to produce the maximum amount of sunscreen or resin thc in the plant. It allows it to live up to its potential.from mel thomas's book ::edit:: cannabis cultivation
"three 10-minute exposures of UV light during the peak hours of the light cycle will result in up to a 10% increase in yield"
My uvb is a T8Is a uvb a t5 usually or MH?
Check out the link. This guy did UVB and no UVB and had it tested. UVB exposed plants tested higher. Also the pictures showed the difference. Look on IC they have results.. Thats what happens when combusted. No? If there was a great deal of truth I think more would be looking into it.
How much of and increase? Noticable?
Has anyone ever done a blind trial? Doubt any difference would be noticed.
Would love to be part of the judges if this experiment ever goes down. Haha
Peace
U mean this link?, buried on page 10:Check out the link. This guy did UVB and no UVB and had it tested. UVB exposed plants tested higher. Also the pictures showed the difference. Look on IC they have results.
Hope that helps.