How far the light should be from the plants?

A customer has a question and I hope we can get some opinions on it, thanks

“Hey, I have a question about my grow and I wanted to see if anyone can help me. I have a 300 w led full spectrum grow light and I cannot find a straight answer online as to how far the light should be from the plants. They’re on their 4th week in veg. I had been growing outside until recently and I had to bring them in the house because of weather issues. First grow so any info would be awesome. Only 2 plants.”

Generally a 300 watt LED light would need to be about 2 feet above the top of the plants!


Also depending on what light you bought it will come with a paper that tells you how high you should keep it over your plants for each phase of growth.

I have a Mars hydro 300w led actual draw 134 or 132 I forget, but due to my space issues my plants have barely had 2ft of clearance throughout there life’s and the only problem they had was when I put them under the 300w for the first time after starting under a 20w led. I’m on my first grow so for all I know all my buds will be bleached but just my opinion so far in my very early grow career

Yeah I have the galaxyhydro 300w full spectrum LED light. I would just follow the manufacturers instructions and keep the light at the suggested distance from the top of the canopy. That’s what I’ve done and I haven’t had any issues. If height is an issue you might have to change lights.

I still haven’t had any issues with it. I guess I’ll find out for real when my test grow Finishes n I see if I get bleached buds.

I’m pretty sure the recommended distance is 2 feet in veg and more like 18 in flower. So no bleaching your buds. They will not be happy!


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I’m starting to get some light stress on my leaves… Might have to buy a CFL set-up…

Should of put up a scrog a couple weeks back when I was thinking I might need it… :confused: Raise the 300w as high as it’ll go just now… Hopefully it’ll be enough…

Maybe a picture of what you’re seeing? In natural light please.

Sometimes a 2nd or 3rd set of eyes is a good thing!


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I don’t really think it’s happening yet, just think as the colas grow they will get closer n closer to the led :X