Hps vs New L.E.D.s

Banana444 said:
Your just plain wrong. Depending on what you put that 1000w into, will dictate what is produced. Saying 1000w put into any light source will create the same heat is wrong. I have a tad over 600w of leds in a 4x4, temps are 5 degrees above ambient temp and is 77, if i take all that down and put a 400w mh in there, it would be right about 85degrees. Why? Because hid is far less efficient at turning electricity into light and creates far more heat.
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I agree; heat is just one form of energy (since the amount of energy in the universe remains constant) and LED's and HID do convert electrical energy at diffent efficiencies, LED's converting much more of the energy into photons than heat, thus First Law and LoCoE is not violated.
 
i'd REALLY like to have two identical chambers, put a 1k hps in one, and an led that actually draws 1k in the other and see what happens. the laws of thermodynamics are immutable, it sure seems like if you're putting 1k in, its gonna come out somewhere....doesn't matter what it comes out as, energy in has to come out...somewhere.
i've always thought the advantage was that you can get the same effects from a smaller amount of electricity, so it runs cooler because it has less power going through it to begin with....?
 
If the wattage is the same, electric consumption will be the same.
Led's will give you the right spectrum of absorbable light the plant needs. With hid's, you are getting something like 15% usable spectrum and the rest is heat waste. So theoretically, and in practice, you can run less wattage in a led light and get the same results as hid. A good quality true 200w led will at least compete if not outperform a 400w hps.
I don't know about all this new cob stuff. I run a true180w led from 2010 with 1w diodes and get good results for personal grow.
 

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J. Killroy13 said:
I am sure this has been covered before but I set my room up with a 600w hps. I have been thinking about getting an led to cut down on electricity and heat. My main concern is plant production. So to the vetters out there who have tried both, what are my realistic expectations?
How to they really compare in plant productivity?
How much can I honestly save in electricity?
How much temp do they cut out?
Is there any drawbacks of using them that I am not thinking about?
I just have 4 babies in a little Nft system, any help will be appreciated.
Productivity is my main focus but don't care to invest the money for a better future.
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I used to use a 600w HPS, still have it and a 1000w hps too. I found that 50w/sf for blooming and 25w/sf for vegging works similar to what you experienced with hps. Upi can build them, buy them or pay someone to build your COB lights, along withe some supplemental lighting such as Royal Blue for veg, Deep red and IR for bloom and far red for lights out 15 minutes. You can build or have built a light that exceeds any commercially built light, except for locally motivated light companies like PLC, Cutter, etc.For about $700 per 200w, 2x2 2-200w 2x4, etc. fixture is possible. peace
 
Twilightbud said:
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Banana444 said:
Your just plain wrong. Depending on what you put that 1000w into, will dictate what is produced. Saying 1000w put into any light source will create the same heat is wrong. I have a tad over 600w of leds in a 4x4, temps are 5 degrees above ambient temp and is 77, if i take all that down and put a 400w mh in there, it would be right about 85degrees. Why? Because hid is far less efficient at turning electricity into light and creates far more heat.
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yeah your correct on a few points,mainly the heat,i'm not an led hater by any means, even been researching heavily on it. but dollar for dollar the hps still big dog on the block. I will admit I am very impressed by the new cobs and what i see some others doing with them.I look forward to not having to run ac because of the lights. so hopefully the leds will prove their worth in the near future
 
a watt is a watt is a watt...

Now led's use different types of heat transfer, that might make them feel cooler, but a watt is a watt is a watt.

PPF is certainly higher with some diodes, versus a point source bulb, but a watt is watt is a watt.
 
Abiqua said:
a watt is a watt is a watt...

Now led's use different types of heat transfer, that might make them feel cooler, but a watt is a watt is a watt.

PPF is certainly higher with some diodes, versus a point source bulb, but a watt is watt is a watt.
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exactly, leds just disappate the heat differently than hid lights, they get hot if they don't have a heatsink that's large enough or a heat sink and fan blowing across it to cool the heat sink, the heat is still made and broadcast to the surrounding area, 1000w of led will make the same heat as 1000w of hid. The main advantage to LEDs is you don't need to use as much watts to achieve the same results.
 
Yodaweed said:
exactly, leds just disappate the heat differently than hid lights, they get hot if they don't have a heatsink that's large enough or a heat sink and fan blowing across it to cool the heat sink, the heat is still made and broadcast to the surrounding area, 1000w of led will make the same heat as 1000w of hid. The main advantage to LEDs is you don't need to use as much watts to achieve the same results.
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Right if an HPS or bulb point source didn't put out so much IR,you could use less wattage, because that's basically what the LED's are doing.

That streak of IR @850nm is a fucking doozy right onto the canopy.
 
J. Killroy13 said:
Guys I really appreciate all this knowledge and different points of view but I am looking for factual info on decreases of heat and electricity bill. I am running a 600 hps,,,,so I would replace with comparable LEDs? My questions are really wanting to know plant production, heating temp differences and money saved at the power bill. Anybody switched from a 600 hps have this info?
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I switched from 2000w of hid to 1300w of cob to cover the same area. So far my a/c has hardly gone off. I even thought i may have forgot to plug it in and had to check at first. Lol

So halved my light electricity and dropped a ton on the a/c too.

Will see how cobs produce now...
 
Whats the Best Most Powerful LED made regardless of cost ? Also don't care how much heat it puts out... 10 watt Diodes ????

Only the Most Powerful/Penetrating, and does it as well, or better as the Gavita 1000.

I also don't care about the heat of the Gavita as I can easily deal with any heat.

That's why I ask whats the Most Powerful/Penetrating LED Regardless of heat/cost ect.
 
jimihendrix1 said:
Whats the Best Most Powerful LED made regardless of cost ? Also don't care how much heat it puts out... 10 watt Diodes ????

Only the Most Powerful/Penetrating, and does it as well, or better as the Gavita 1000.

I also don't care about the heat of the Gavita as I can easily deal with any heat.

That's why I ask whats the Most Powerful/Penetrating LED Regardless of heat/cost ect.
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Most likely CXB3590's from cree are the best , watt for watt.

https://cobkits.com/product/cree-cxb3590-36v/

I like these a lot too for the price and quality/performance

https://cobkits.com/product/citizen-clu058-1825-90cri/
 
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