Distance of Light from Plants

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I am going to place LED lights for my indoor flowering plants.

As there is already a provision for placing lights on the ceiling. It would be
easy for me to place the light right up there on the ceiling.
The vertical distance between the floor and the ceiling is 10 feet approx.
Now my doubt is, how important is the distance of light from the plants ?
If 10 feet is little far above the plants then, how about the increasing
the number of lights to compensate for the distance ?

Thanks.
 
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For artificial light, it is best to put the source as close as possible without burning the plant. I find that 6 to 8 inches works the best.
 
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When starting seedlings the closer the better to the light. Having the light about 6' from the plants will not work. They must be close
 

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LED lights put out so little heat that you can put the light as close as you want. Some plants however can get too much light and cause spots and other issues. I use LED's indoors and grow multiple things and have never had this happen. I use a 400watt Full Spectrum Led. The light is literally half inch from plant with absolutely no issues. My LED had 2 small fans built into it though so other LED's may be a little warmer- but its not going to be by much.
 

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