Are leds a lot cooler than hps?

Blackcat01 said:

Currently running 4x 600w digital hps but having problems with the heat in my room. I already have an intake from outside and a large outtake fan so have had to turn them all down as an attempt to lower the temp (currently 33 c).

what I am wondering is how much cooler would 4 led lights be let’s say something like the Mars hydro 2000’s and would this be a better all round setup? Would I need 4 2000’s or would 3 give an equal amount of light and par/ umols. Thanks

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Blackcat01 said:

Currently running 4x 600w digital hps but having problems with the heat in my room. I already have an intake from outside and a large outtake fan so have had to turn them all down as an attempt to lower the temp (currently 33 c).

what I am wondering is how much cooler would 4 led lights be let’s say something like the Mars hydro 2000’s and would this be a better all round setup? Would I need 4 2000’s or would 3 give an equal amount of light and par/ umols. Thanks

Click to expand...

Blackcat01 said:

Currently running 4x 600w digital hps but having problems with the heat in my room. I already have an intake from outside and a large outtake fan so have had to turn them all down as an attempt to lower the temp (currently 33 c).

what I am wondering is how much cooler would 4 led lights be let’s say something like the Mars hydro 2000’s and would this be a better all round setup? Would I need 4 2000’s or would 3 give an equal amount of light and par/ umols. Thanks

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Southernontariogrower said:

Yes are 20 degrees cooler imo only, but temps in tent arent unbareble With leds. Were with hps. Omly 2nd run with leds and loving them.

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jonnynobody said:

LED runs exponentially cooler than HPS lighting. I just yanked 2 1000w hps lamps, ballasts, and air cooled hoods out of my flower room. I replaced them with 2 660w LED qb's because I don't want my ac running non stop from lights on to lights off every day through summer. Not to mention a $250/month savings on electric while producing the same output per harvest. The 660's certainly give off some heat but to compare it to the heat output of a 600w or 1000w hps lamp is laughable. You could replace all 4 of those 600w HID's with 450w qb's and have better yields, minimal heat, and a lower electric bill. If you're going the amazon route for your qb's I would recommend spider farmer. Mars hydro is a little skeezy. Their lights aren't trash but there are suppliers with better equipment for the same amount of money.

Hell, you could put 4 660's in there and have less heat than 4 of those 600w HPS lamps and ballasts. HID for indoor cultivation is essentially obsolete at this point in the game. 5 years from now you won't find one in a grow shop. It's just antiquated technology anymore.

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Blackcat01 said:

Thanks for the great info pal, what spider farmers did you move to and what would you suggest to switch to to replace 4 hps / to accommodate 12 autos

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Blackcat01 said:

What’s your current set up pal and how many hps was you running?

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Blackcat01 said:

Thanks for the great info pal, what spider farmers did you move to and what would you suggest to switch to to replace 4 hps / to accommodate 12 autos

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Blackcat01 said:

Thanks for the great info pal, what spider farmers did you move to and what would you suggest to switch to to replace 4 hps / to accommodate 12 autos

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Roger A. Shrubber said:

there is a law of watts in = btu out. you are going to get 3.41 btu out for every watt you put in. period. no matter what kind of light it is.
the advantage to leds is that there is less radiant heat, so the surfaces in your grow area won't absorb as much of the heat, and you can use less watts to get the same results you would get from h.i.d. lighting, so less watts in = less btus out.
but do they actually run cooler? no...they ALL make 3.41 btu per watt...they just sometimes make it in different forms that may be easier to get rid of.
and that's toasters, hairdryers, tvs, industrial strength dildos....they all produce 3.41 btu per watt

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MidnightSun72 said:

Here's the thing yes and no.

If you swapped out your 4 lights for 600W leds. The. The heat BTU would be identical. However. In an LeD room you want higher temperatures to compensate for lack of infrared. And the second thing is I find LED mostly keep all their heat at or above the fixture. So an extraction fan placed above the light will suck almost all the heat away no problem at all. With HPS lights much of the heat is beamed down in the form of IR. It's heating all the plants and surfaces in the grow room. So I found a fab wouldn't suck out all the heat as easily.

so ya LEDs are cooler in that it's easier to control the heat IMO.

the orher thing is you could swap those 4 lights out for 4X 400-480W quality LEDs. You will save heat, save watts and probably still have a little more yield.

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Star Dog said:

That's interesting because I couldn't work the fuck out how my heater and dehumidifier both heated the tent to within a few 10th of each other (both 150w) one being a heater it's reasonable expectation that it will produce more heat than a dehumidifier... It doesn't + the dehumidifier lowers rh as well as heating .

I,m using 400w of led I'm surprised at how much heat is generated, as said up thread, the heat is much the same but its easier to maintain with higher rh% and there's much less radiant heat.
I think hps takes a bit of beating, in my climate led is useless outside of summer, that radiated heat becomes a bonus during autumn/winter/spring.

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Hollatchaboy said:

I believe it depends on what kind of led you're talking about. My quantum board stays cool underneath the board, so do my bars, but my cobs are a different story. They're more like halogens and I can feel heat in the light beam. They heat my tent up something fierce but I feel like I get more penetration with them, so I use them to flower.

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