LED heat

J

Jp1234567

New Member
Hi guys

Been growing for a very long time.

My current set up consists of 2x 4.5 x 4.5 side by side set ups, each under its own 1000w hps respectfully.

I have a humongous carbon filter with ducting exiting the room (12×8) via an extractor.

Airflow is fine and temp stable at 28.5c

I tend to grow scrog with 40 in each setup.

However, thinking of switching to led.

Was going to go 2x hlg 550 v2r but the drop off of luminums around the edoes is s concern.

So, here's the golden question:

I have seen some reasonably priced leds (not blurple) that measure 10"×5" and draw 100w power while putting out 800w equivalent light (epistar 3500) - 115 leds putting out 90 luminums each .

AlL use drivers and heat sinks no fans.

Probably overkill but if I was to run 9x units per grow site, so 18 units in the room, what kid of heat would I be looking at?

Cheers
J
 
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Johnny Lawrence

Johnny Lawrence

Well-Known Member
You're going from 2000 watts to 1800, so you'll essentially be dealing with the same heat issues.

Any company that claims they make a 100 watt light equivalent to 800 watts is full of shit and should be avoided simply for the fact that they are assholes for using such pathetic marketing tactics.

The 550s will perform almost as well as your HPS lights, maybe a tad less. They're still warm, but not as hot as your 1000s. Doesn't HLG have a slightly more powerful light? I thought they did.
 
steve870

steve870

Well-Known Member
that 800w equivalent claim is unrealistic
a good rule of thumb is to replace 1000w hps with 1000w of led
 
Gond00s

Gond00s

Well-Known Member
Johnny Lawrence said:
You're going from 2000 watts to 1800, so you'll essentially be dealing with the same heat issues.

Any company that claims they make a 100 watt light equivalent to 800 watts is full of shit and should be avoided simply for the fact that they are assholes for using such pathetic marketing tactics.

The 550s will perform almost as well as your HPS lights, maybe a tad less. They're still warm, but not as hot as your 1000s. Doesn't HLG have a slightly more powerful light? I thought they did.
Click to expand...
the new 650 right yea its suppose to do a 5x5
 
J

Jp1234567

New Member
*would like to point out that I'm happy with the yield I obtain from the 2x 100w hps, I'm just trying to get a better even coverage
 
J

Jp1234567

New Member
Boatguy said:
At 50w per square foot my leds make my plants unhappy. 35 per they are just fine. It isnt an even swap
Click to expand...
Oh, might be overdoing it a tad then :(

The issue I have with the current set up is light drop off on the pkants 3ft out of the centre. I don't want to add extra lights to the current setup as it will increase running costs :(
 
Johnny Lawrence

Johnny Lawrence

Well-Known Member
steve870 said:
that 800w equivalent claim is unrealistic
a good rule of thumb is to replace 1000w hps with 1000w of led
Click to expand...
No. It's in the 700 to 800 watt range to replace an SE 1000. And that number is only for high quality LEDs. Lights with cheaper diodes or blurples, it's basically a watt for watt change versus an HID.
 
L

Lpt

Well-Known Member
Have a look into building strips it's really not hard and will save lots . Another bonus is you can build eaxtly to your specific needs.
 
Johnny Lawrence

Johnny Lawrence

Well-Known Member
Jp1234567 said:
Oh, might be overdoing it a tad then :(

The issue I have with the current set up is light drop off on the pkants 3ft out of the centre. I don't want to add extra lights to the current setup as it will increase running costs :(
Click to expand...
Your 2 1000s should cover a 4.5 by area just fine. If heat or electricity consumption are an issue, then yeah, switch them out. If not, then why even bother.

BTW, 800 to 1000 watts of really high quality cobs or chips would crush that space and would in fact outperform the HIDs. Something to consider.
 
L

Lpt

Well-Known Member
Lpt said:
Have a look into building strips it's really not hard and will save lots . Another bonus is you can build eaxtly to your specific needs.
Click to expand...
ledgardener.com

DIY LED Strip Build Designs for Samsung H-Series, F-Series, Q-Series, and Bridgelux EB Gen.2 - LED Gardener

DIY LED strip builds have become very popular recently. The mid-power section of our forum is full of threads created by DIYers looking to build their own custom lights, and new builds and ideas are surfacing every day. If you don’t live somewhere where you have easy access to premade lights...
ledgardener.com
 
J

Jp1234567

New Member
Wish I could but I'd end up frying myself :(

These are the lights in question - as you can see, far cheaper to get 9 of these tgan a single hlg

www.ebay.co.uk

LED GROW LIGHT 220~ 240 v ac. MANCHESTER | eBay

NO DAFT FANS BLOWING HARMFUL HEAT AROUND DRYING YOUR BABIES OUT, RELIES ON COOLING FIN ARRAY SO NO NOISE. Citizen 3500K LED COBS. PUMPING OUT AROUND 90 LMNS PER WATT. 220~240V A.C. 50~60 HZ. POWER LEAD IS ABOUT 4/5 FT LONG AND HAS 3 PIN UK PLUG.
www.ebay.co.uk
 
Boatguy

Boatguy

Well-Known Member
Jp1234567 said:
Wish I could but I'd end up frying myself :(

These are the lights in question - as you can see, far cheaper to get 9 of these tgan a single hlg

www.ebay.co.uk

LED GROW LIGHT 220~ 240 v ac. MANCHESTER | eBay

NO DAFT FANS BLOWING HARMFUL HEAT AROUND DRYING YOUR BABIES OUT, RELIES ON COOLING FIN ARRAY SO NO NOISE. Citizen 3500K LED COBS. PUMPING OUT AROUND 90 LMNS PER WATT. 220~240V A.C. 50~60 HZ. POWER LEAD IS ABOUT 4/5 FT LONG AND HAS 3 PIN UK PLUG.
www.ebay.co.uk
Click to expand...
For good reason. If you arent going to get an efficient led, just stick with hid
 
Boatguy

Boatguy

Well-Known Member
If i had your kind of space led would be out of my budget. In my 5 sq/ft it is easily within my budget.
Good Luck
 
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