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PipeCarver
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I looked into uv lights and after watching a video by Dr.Bruce Bugbee I decided to go with the side lighting instead. I've tried growing the GDP a couple of times and I've not had much luck with them...Who knows maybe your idea of more uv rays is why they just grew not thrived....The led's I have now provide some UV lighting but its increasing the far reds I've been reading about I'm interested in seeing the results from lights like these say they provide light into the 850nmSo far, I've only been using 120 watts total for lighting. That's having 4 two foot long and 4 four-foot-long LED lights running. Add another 35 watts for heating and air movement. I'll be damned if I'm going to burn 400 watts or more, and then also have to run a fulltime exhaust fan or air conditioner to keep things in control.
In the next week, I'll be adding 2 15-watt Uvb bulbs to the mix. They will only be on 4 hours a day, during the middle of the light cycle, to simulate the high altitudes that the plant is native to. Granddaddy Purple is an indica that has landroots based in the mountains of Afghanistan, usually grown at elevations of 15k feet., which results in higher exposure to the Uvb rays. This is supposed to result in a higher trichome count as the plant tries to protect itself from UV damage.
Time will tell.
Have a good day.
4 of those in the corners in spot lights aimed where you want or on clips hanging where ever for best coverage.