LED light 12 inches above canopy during flower?

CTgrower420

CTgrower420

Member
Currently running my LED grow lights Spider Farmer SE5000 about 12” above the canopy of the tallest plants in my grow turned up pretty much to the max power 620PPFD-1100PPFD is what I’m getting throughout my canopy’s from lowest to tallest plant is this a safe distance? The lights can’t be raised any higher reached max height!
 

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CTgrower420

CTgrower420

Member
cannabiscrusader said:
The leaf edges at the tops will begin to discolor. If you don't dim the lights at that point, water will continue to transpire from the leaf faster than the nutrients can be used. This leads to a buildup of nutrients that begin to burn the leaves.
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Raised it to highest it possibly can get 13” above tallest colas 22” above shortest colas
 
coreywebster

coreywebster

Well-Known Member
Going against popular opinion, I'd say its fine because it's a bar light your not getting massive hotshots.

Mine are about 6" off the tops I think.

Personally though I'd bend all those plant gently out and tuck them.. lots of wasted space in that net and you can fill it by pulling them tops one way or another
 
CTgrower420

CTgrower420

Member
coreywebster said:
Going against popular opinion, I'd say its fine because it's a bar light your not getting massive hotshots.

Mine are about 6" off the tops I think.

Personally though I'd bend all those plant gently out and tuck them.. lots of wasted space in that net and you can fill it by pulling them tops one way or another
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Next grow I’ll be filling fully this was my first grow using trellis nets
They been doing ok at 13” above canopy even at max power because the grow light is only 480w max
If have to add another net to bend the tall ones but they are budding already so I’ll just have to wait till next run
 

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1212ham

Well-Known Member
cannabiscrusader said:
I have a bar light in one of my tents too, a KS5000. That thing will still slowly roast a canopy at %50 if it's any closer than 16". Everyone's set up is different too, not just environment. I'm an electrician, and I've seen some home panels running at 126v some at 116v. That makes a huge difference in your led output. Using olm's law you can see it with the numbers.

Amps = voltage ÷ resistance
I = E/R

Well say a bar is 10ohms

I = 116v / 10
I = 11.6 amps

I = 126v / 10
I = 12.6 amps

That's an extreme variation, but something to consider. 1 amp is a big difference when we are talking about inches of light placement.
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It doesn't work that way, LEDs don't connect directly to AC power, they are powered by drivers that regulate voltage and current.

Most Meanwell drivers are rated to operate on 90-305 volts AC, but the diodes get the same power.
 
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