DennisBrown
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Have you noticed a difference in response or tolerance from cannabis from different regions? Certainly different parts of the globe have different uv regimens....
Absolutely, and in some cases, a radical difference. In general, Indicas can handle 2 or 3 times more UV than sativa. That makes sense since indica is a high mountain strain, and the higher you go, the less atmosphere there is to filter the UV, so really high mountain strains had to evolve a much higher tolerance. One of my testers, Walter P. Haze, had me build him a custom fixture to use on some OG Kush. Real stuff, shipped from the middle east. Instead of 1 bulb at 20 watts, it had two bulbs, 80 watts each, so 160w total. 8X the normal UV. I have a few crazy testers like that, who want to push the envelope, way beyond good judgement. He had to work them up over several weeks, but they could take several hours a day. That would fry a sativa.