LED groom heat?

[Bucket]

I am thinking on converting my groom to LED which ive always held back on coz of price.

Im looking at 2x HLG 650R seem to be best on market. Will equal my current 2x1000 HPS.

My current set up is aircooled, otherwise would be impossible in summer.

Any LED growers got an idea how much heat would be producing in summer? & lack of heat in winter.

Cheers.

Happy Christmas.

[GEORGE]

I've got two 130W Budget, and they don't put out any heat, A couple of degrees above room temps is all,
Don't know if A 650 would be that cool, but don't see it being too hot. JMO

[gardro]

1260w of led = 4300BTUs of heat to play with, in other words a shit load.

I wouldnt drop it into a room that was dialled in for 2000w as that wouldnt work but those 2 leds will give off more heat than a 1000w bulb....about 260w more.


Merry Christmas

[Dirty_badger]

I ran my 650R the other day with my extract and aircon turned off and temps hit 38°C I only did it to see how hot it gets.

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[Bucket]

Cheers guys, sounds like could end up with a bigger problem in the summer. What worried me.

[funkydawg]

I was running 2x Mars sp250's in my tent with numerous 4inch fans and they couldn't cope lucky to see under 31c with fans running full belt.

I changed to 6inch fans, echotechnics controller and a 600w hps cool hood this solved the problem

I'm wanting to go with the hlg lights but like you I'm unsure how my temps will be in summer even with upgraded 6inch high flow fans and an environment controller.

Pal of mine runs 2x 600w hps with standard hoods through the summer and can stay under 30c but he uses them big 8inch isomax fans and aircon unit at peak temp

This is all in an outside wood shed with felt roof.

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[Shreder]

with leds u need less watts to reach optimal light level but its a myth they dont heat... They just use less watts, so they heat less.

Ongoing diary >>> OGKZ / Gelat.OG / GZ / LSD (Coco, 750w lm301b)

[Bucket]

Maybe removing the ballast & having outside the tent would make an improvement.

I have pretty decent extract, but also another extract for the hoods, which makes it possible.

I dont see any of these LED reviews talking about this, they all seem to have aircon tho.

[Max - LEDTonic]

What Shreder said above^
One watt will produce 3.41 Btu/h, and 100w LED, HPS, MH, or CFL, will all produce just as much heat, 341 Btu/h.

The difference between them is how much light they can produce with 100w, and that differs a lot.
Even if a light source is 100% efficient and all of the 100 watts are turned into light, the light will eventually turn into heat. While mylar is highly reflective, every photon will at some point be absorbed on a surface, and become heat. Energy cannot be created or destroyed, it can only change form (the first law of thermodynamics), and the lowest form of energy is heat.

The more efficient lamps we use, the fewer watts we need to reach a certain light intensity. Aside from air exchange and ventilation to transport and manage heat, lamp efficacy is key when it comes to creating as little heat as possible.
Some of the light energy is converted to carbohydrates and stored in our plants but that's only between 3-6% of all the light that lands on our plants according to Wikipedia - Photosynthetic efficiency, which is a rather small part of all light created in our grow spaces.

Removing the LED's driver from a grow space will have an impact as it accounts for between 5-15% of a lamp's total heat output, as LED drivers often are between 85-95% efficient. Large MeanWell and Inventronics drivers are top-tier and often around 94% efficient. 6% of 630w results in around 38 watts of heat produced by the driver.

The 650r is a great lamp and produce as much light as a 1000w DE HPS (1770 µmol/s), while only drawing 630 watts.
Single-ended 1000w HPS lamps are even less efficient and seem to produce between 1000-1300 µmol/s, depending on the brand (source: Jacob A. Nelson & Bruce Bugbee).

[AndrewsGoldenBud]

Good information