T.C. Bosby
Well-Known Member
I'm currently running into some awful heat issues in my tent and was wondering how much cooler do LEDs actually run in comparison to a HID light?
Temps - LED vs HID
- Thread starter T.C. Bosby
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- heat hid hps led temperature
Hi, LED produce heat too but less than HID
But you got to tell what your stuff .... 250W 400W 600W HID ?
And dont forget that you wont be able to have less than ambiant temp , unless you have an air conditoner.
The temperature under led will depends on
which led you'll take ( cob or single led )
how much you will drive them,
on how much power you want
and also which cooling solution you take,
example with a cpu air cooler , the heat is blowing right on the plant so its, things i 've never read when i was searching information to make my DIY.
If you use AIO water cooling, you wont have this problem and win some precious degrees, but its more expensive
But you got to tell what your stuff .... 250W 400W 600W HID ?
And dont forget that you wont be able to have less than ambiant temp , unless you have an air conditoner.
The temperature under led will depends on
which led you'll take ( cob or single led )
how much you will drive them,
on how much power you want
and also which cooling solution you take,
example with a cpu air cooler , the heat is blowing right on the plant so its, things i 've never read when i was searching information to make my DIY.
If you use AIO water cooling, you wont have this problem and win some precious degrees, but its more expensive
tomate
Well-Known Member
An LED setup will produce 20-40% less heat depending on how you drive them.
The less heat dissipation you want, the more expensive the setup will become.
A DIY LED fixture for example that produces 40% less heat compared to the best HID (same PPFD) will cost about twice as much as one that produces 20% less but will also be about 20% more efficient if it comes to the lumens per watt output.
The less heat dissipation you want, the more expensive the setup will become.
A DIY LED fixture for example that produces 40% less heat compared to the best HID (same PPFD) will cost about twice as much as one that produces 20% less but will also be about 20% more efficient if it comes to the lumens per watt output.
testiclees
Well-Known Member
Bro by this do you mean that 1000w at the wall with an hid will generate the same amount of heat as 1000w at the wall with 65%efficient cob?
Growmau5
Well-Known Member
One of the biggest myths about led, perpetuated by the all marketing hype led companies .
"LEDs produce half the heat as HPS" FALSE!!!
As @BOBBY_G said 1000w of ledproduces similar heat as a 1000w HPS. Led is slightly less, to calculate how much , you would look at the REQ of the HPS bulb and subtract a portion of the energy in the IR range
Like he said: you can do the job of a 1000w HPS with 600-700w of led. That's were the photon:Heat efficiency comes into play & determines just how much less wattage you need.
General rule of thumb : use 3.4-4 btu/hr to cool each Joule/sec (aka watt) consumed at the wall.
"LEDs produce half the heat as HPS" FALSE!!!
As @BOBBY_G said 1000w of ledproduces similar heat as a 1000w HPS. Led is slightly less, to calculate how much , you would look at the REQ of the HPS bulb and subtract a portion of the energy in the IR range
Like he said: you can do the job of a 1000w HPS with 600-700w of led. That's were the photon:Heat efficiency comes into play & determines just how much less wattage you need.
General rule of thumb : use 3.4-4 btu/hr to cool each Joule/sec (aka watt) consumed at the wall.
BOBBY_G
Well-Known Member
yes thats exactly what i mean. maybe not the same leaf temps but in a sealed room the same overall heat
thetr33man
Well-Known Member
1000w LED produces the same amount of ENERGY as a 1000w HPS. It doesnt produce the same amount of heat because a higher percentage electricity consumed is emitted as light instead of heat. I know Im nit picking. LED 1000 watts gives of 600w of light and 400w of heat, HPS gives of about the opposite, but light turns into heat in a confined space, eventually. So you have to remove the same amount of energy from the enclosure either way.
BOBBY_G
Well-Known Member
which becomes heat when it falls on a surface. ALL spectrum of light has a radiant component to it, not just IR only. but yeah thats what you said. i think its better to consider the 600W of 'heat' frm the hps as 'waste' heat, as it is not total heat
thetr33man
Well-Known Member
I reread my above statement and one thing I stated is wrong. You dont have to remove the same amount of energy either way because light that hits plants, a % of it is converted into plant material via photosynthesis, so it never actually becomes waste heat, unlike the HPS where a much larger percentage of the total electricity used has to be removed from the grow environment. Along with all the waste heat produced directly by the bulb (and ballast), HPS has a much larger amount of infrared radiation produced, which the plants cant really use, although it can influence their growth via hormonal changes, but this is pretty much all converted to heat upon hitting the plants or enclosure also, so needs to be removed as a waste product. It would be interesting to know how much of the energy consumed by the light, is actually used by the plant. I know that with LED the amount of energy used is much higher than with HPS, which is reflected in people getting up to 2g/w yields under LED, but overall I bet it is still quite low.
dandyrandy
Well-Known Member
And leds are directional. No reflector needed. Hence vertical came along.
dandyrandy
Well-Known Member
Check out some diy coolhood builds with cobs. In a basement @69 degrees the temp 8" below the lights 16 3590's running ~700w is 83. 16" below ~ 78. That's canopy top. 11 sq foot 8 ft tall. Around 100cfm cools it.
dandyrandy
Well-Known Member
So some colors are hotter. Like Brazilian women.
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