Yo, My Grow Lights Too Low? Grow light bulbs? LED Grow lights? HID lights? We get marijuana lighting questions all day long. What’s the best vegging grow lights? Or what are the best flowering grow lights? What about fluorescent grow lights? We get asked about these things a lot. So to find out, STUFF STONERS LIKE have teamed-up with expert herb grower, Mel Thomas. He’s the author of Cannabis Cultivation: A Complete Grower’s Guide, 3rd Edition. It’s published by Green Candy Press. Mel’s a world-renowned cannabis cultivator and at one time was the largest producer of marijuana in the UK. Have a question for him? Then email us at stuffstonerslike[at]yahoo.com.
QUESTION: Yo, My Grow Lights Too Low? I just picked up some purple kush clones from the club. They’re short and squatty, so I moved my 600 watt HPS light to about a foot and a half above them and they look a little shriveled. I moved the light up about another two feet. Was the light too close?
MEL THOMAS: The best way to check if your lights are too close to the plants is to test it with the back of your hand. Put your hand next to the top of the plant, if its too hot for your hand the lamps need moving up.