Quote Originally Posted by seventhchild
well...the scientists who conducted the test found yellow and uv harmed the plant they were growing . does this damage occur in cannabis ?in the case of UV we can safely say YES but MJ counteracts or responds to UV in a way that many growers find beneficial. does yellow[600nm] cause a similar response in pot ? I don't know...maybe/maybe not but if someone could point me to a narrow band light source centered at 600nm i would be willing to run a trial to find out.I don't need mega watts just something to hang between 4 18" buds as a supplement.
That's what I like to hear!
If we are not sure, we try sumpin an' see what happens.
Goodonya!:thumbsup:

Dang!
You made me go slog through that entire turgid, repetitive, PDF!
There's 10 minutes wasted.


A critical read of that PDF, indicates that wheels may get spun to no avail.

It starts out with what I consider to be a a weak statement for their case. (bolding is mine)

"primarily associated with UV rather than photosynthetically active light wavelengths."

Then another weak statement;

[align=left]"Interestingly,
our result showed that the quantum efficiency of
photodamage has a small but apparent peak at yellow[/align]
(600 nm) wavelength in the visible light region"

Then they admit that other studies found no yellow peak and they offer several hypothesis for their conflicting results.":wtf:

"The spectrum
[align=left]of photodamage efficiency shown in Arabidopsis
intact leaves had no visible light peak (Sarvikas et al.,
2006). The difference with our results may be due to a
different content of leaf pigments (the leaf used in our
study might have higher amount of photosynthetic
pigments or lower amounts of green-yellow absorbing
pigments such as carotenoids and phenolic compounds).
Further studies are necessary to verify this[/align]
hypothesis.":wtf:

This is not good science, my friend!

I would not waste any resources chasing the transient "pip" described in this paper.
You will note that they attempted to disable the plants, "damage control" .
Unless you have some lincomycin or chloramphenicol laying around, cannabis will simply repair any "damage", should any occur, and we will be none the wiser, yah?

In short, this is a non-issue.
Might even be a fnord

Aloha,
Weezard