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Hey guys, I just cant figure this one out. I've got symptoms on all plants under cob led in raised beds. The plants are growing, but the tips and margins are burnt only on the new growth. The last run in this room went fine and the soil hasn't been amended. Soil is kept nice and moist and grow...

A few years ago I decided that I wanted to grow more efficiently with a lower impact. I found this forum and read a lot and decided to switch over to COBs. I built an 8x20 no till bed and built a pretty large COB array sourced from cobkits. My setup is: 96 x CLU058 1825 chips powered by 24 x...

Wondering how best to check temperature of cobs? Mine are running on passive sinks. I have an infrared thermometer, but heard you can't get good readings from bare aluminum. How about anodized pin sinks... where do I check and what is the danger zone? Running citis if it matters. Just finished...

In an industry typically inundated with "hippies", it seems odd that no one has really brought up the green benefits of cob lighting. I just hear HPS growers saying "fuck it, power is cheap." I think the cost of energy is larger than the $0.12/kwh on my bill. Ive seen crazy estimates about the...