Chronikool
Well-Known Member
This is the part that keepz me coming back...
Who says LED doesnt grow big flowers?
- Thread starter KineBoisin420
- Start date
Greengenes707
Well-Known Member
I understood exactly what you mean by not all watts are the same. More photons emitted for same price.
And as for heat it all depends on where/when it's measure...yes eventual it all gets turned into heat(1 btu=3.4144 no matter the source or efficiency), but that's after it is use if it is light first. The less efficient sources will give off pure IR(heat) and then also what the visible light gets converted to after it's used/absorbed.
Lets not forget about the hottest point on each...the 1500*bulb...or the <100*heatsink on led's. The way heat gets dissipated has a lot to do with how it will effect the environment it's in.
And as for heat it all depends on where/when it's measure...yes eventual it all gets turned into heat(1 btu=3.4144 no matter the source or efficiency), but that's after it is use if it is light first. The less efficient sources will give off pure IR(heat) and then also what the visible light gets converted to after it's used/absorbed.
Lets not forget about the hottest point on each...the 1500*bulb...or the <100*heatsink on led's. The way heat gets dissipated has a lot to do with how it will effect the environment it's in.
PSUAGRO.
Well-Known Member
1500f really isn't fair, as half the heat is contained within the inner arc & outer envelop of the bulb.
Imagine what temps would be on a passive heatsink measuring 10 inches long 3 inches wide(hps bulb) getting 600w of leds fed to it! Lol
You put your Apache at 600 in a sealed 4x4x4 and put a 600w hps in another sealed 4x4x4......if the draw is the same, the AMBIENT room temp will be the same....that's it.
I can't stop!......ha
Imagine what temps would be on a passive heatsink measuring 10 inches long 3 inches wide(hps bulb) getting 600w of leds fed to it! Lol
You put your Apache at 600 in a sealed 4x4x4 and put a 600w hps in another sealed 4x4x4......if the draw is the same, the AMBIENT room temp will be the same....that's it.
I can't stop!......ha
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Greengenes707
Well-Known Member
Not led's fault that hps heat is concentrated and builds up. Fair has nothing to do with it...the fact is that those high temps are there...even if just in a smaller area...it will raise the ambient and effect your environment way faster and more extremely.
PSUAGRO.
Well-Known Member
Yes hid faster over a smaller area......led slower over a larger area......see where I'm going?
Same outcome! why are we always arguing physics?
hyroot
Well-Known Member
you are the one arguing physics and thermodynamics. still wrong
Greengenes707
Well-Known Member
Our grow rooms are not vacuums and don't play perfectly to simple physics. You are taking for granted that just being in air is cooling them...and the difference between natural ambient and the lighting units operating temps are smaller with led than hps. Equilibrium would be the same watt for watt in a vacuum with 100% reflective walls, but atmosphere is playing a bigger roll with led than hps in real world situations.
So as long as the grow room isn't 100% efficiently sealed from heat exchange...the led's will maintain the ambient room and leaf temps better for longer and possibly without anything other than air movement/exchange...not actual temperature decrease like an AC.
So as long as the grow room isn't 100% efficiently sealed from heat exchange...the led's will maintain the ambient room and leaf temps better for longer and possibly without anything other than air movement/exchange...not actual temperature decrease like an AC.
