LED Grow Lights - Distance from plants?
Most LEDs grow lights work best when kept around 18" or more from the top of the plant, but this can vary from manufacturer to manufacturer. The size of the LED bulbs and the angle the lamp directs light downward all make a big difference on how far your plants need to be without experiencing "sun burn" from LEDs.
LED grow lights can burn your plants even in cooler temperatures!
It used to be thought that you could keep LED grow lights as close as you want because they don't get hot. Unfortunately that's not true, LEDs can give your flowers and leaves light damage even in cool whether. This is known as light burn.
Common signs of light burn are yellowing of the leaves and/or brown spots on leaves. It looks similar to what happens when your plant has a nitrogen deficiency.
So please monitor your plants carefully when first putting plants under grow lights to ensure that you have the optimal distance and avoid damaging your plants.
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