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Removed started grow question 4 years ago
Any advantage to placing LEDs closer than, say 6 or 12 inches to top of plant? I have 3 5 gallon pots so trying to get coverage for all. I feel like there's diminishing returns if you get too close, but if the cone of light covers all 3 plants should I get as close as possible?
FIRST Grow- Sour Diesel Auto
11 weeks
FIRST Grow- Sour Diesel Auto FoggyBottom
Sour Diesel Auto
17 comments · 3 years ago
Resolved
Week 1
Techniques. Defoliation
ShaggyGrower answered grow question 4 years ago
Careful getting LED's too close. Heat burn is unlikely, but light burn is a district possibility and hard to spot until happened (plant showing signs). Regarding fungus gnats, yellow sticky traps are great at catching adults - you seem to have the young ones covered with your neem/soap spray. I cut the yellow traps into pieces and put some pieces near the bottom of the pot so when they crawl out they walk and get stuck on the yellow trap, and place some around the rim of the pot, as well as elsewhere in the tent. I also place Perlite on the top of my pots so the gnats can't dig their way in via the top of the pot.
Experimentgreen answered grow question 4 years ago
All LEDs are different and their maker suggests different heights. However a plant your size would benefit from being at the 18-24inch marker. Also with the fungus gnats if you get those yellow paper traps that just stick in the ground it should catch any flying bugs, and no chemicals. I had bad bug problem, I did neem oil, spinosad, and hydrogen peroxide mixed with water in a spray re at bottle and it fixed it up good.
Happy healthy growing best of luck.
Northeastern answered grow question 4 years ago
I have tried different distances with my low watt LED's but didn't notice a difference. As close as possible i say without it hurting the plant for me that is around 5 inches with a 9.5 watt screw in LED before i see heat stress symptoms. Cupping of the leaves (Looks like a Taco) and White is a sign to back off as these are heat and light stress indicators. The advantage would be its closer so more light as long as the other plants fit within the foot print you should be good. Gl with the grow!.
Stick answered grow question 4 years ago
Hi there! Simple universal test : place your hand at the top of your plants, if it feels very hot, increase the distance and repeat the operation. Then you'll find the perfect apexes/light distance. Hope this helps. Happy growing!
DudeGrowsWeed answered grow question 4 years ago
Be careful of LED burn when placing your lights close. My LED’s are recommended to be 18” above the canopy. I was still getting some burn at that distance so I’m now around 24” away (except for the monster plant that’s currently 48” tall, she’s almost touching the light now. Crossing my fingers for minimal burn).
Removed answered grow question 4 years ago
I use low power LEDS (screw in LED bulbs actually) and can get them as close as 2 inches (3 for seedlings), the closer the light, the more intensity they get, inter nodal length is almost zero and plant development is really fast.
Hope that answers your question