My 1000w Hps Killer

[Getgrowingson]

Hey guys so after a loooong time of researching and sourcing parts I have almost completed my first diy build.

Specs are as follows.
12 x CXB3590 3500K CD driven at 700ma.
12 x 100mm 80* lenses from kingbrite.
3 x Meanwell Hlg185C-700.
3 x 36" 5.88" Heatsinks
3 x Noctua NF-A14 140mm PWM fans.

Have basically everything complete, just need to mount the cobs and holders. Worst part was the tapping but I haven't done it in a while so it took a little longer then expected. I spared no expense or time on this baby and am pretty proud of her. Can't wait to fire her up! And thanks again for everyone's info and guidance throughout the project and from everyone's very helpful threads.

Here are some pica before I mount the cobs and lenses.

 

[Michael Huntherz]

Looks great! I think you will crush with this. If you run it wide open, then yeah, you probably will kill 1000 watters, I can hear the future butthurt already.

 

[GIJonas]

Thing looks sick. However do you have a price comparison to the hps?

 

[silvrsurfer77]

Thing looks sick. However do you have a price comparison to the hps?

Im building something very similar and I can tell you some pricing but it will vary with how you design the fixture.

(12) cxb 3590 @ $47.5ea from kingbrite = $570 ( then shipping options and possible paypal fee)
(3) Meanwell drivers @ $65ea = $195 (+tax&shipping)
(3) 5.88x36 heat sinks @ 62ea = $186 (+tax&shipping)


So your looking at $951 , plus lenses if you choose, plus tax shipping and fees, plus materials like wire, hardware, thermal paste, tools. If your starting with nothing I would say $1200 easily. Its a big investment but what made me go for it was less heat and more efficiency. When you factor in changing hps bulbs and extra AC for them, you make up the difference quickly.

Im basically doing the same set up but ran at 1.4A and dim-able and passively cooled. Still building it though. @1.4A Ive been told cxb 3590 gets 56% efficiency and at 700ma its almost 64% lumens per watt efficiency.

 

[silvrsurfer77]

Also if you cant solder you will have to get cob holders

 

[Abiqua]

Thing looks sick. However do you have a price comparison to the hps?

An HPS only?

Or reduced wattage and hence reduced heat wattage...as well as

Reduced wattage over each sq ft because of spread evenness?

along with

Bulb changes

and

AC use?


Not so easy to compare HPS and LED fixture cost, straight up fixture to fixture.........except if you account every variable that will appear/dissappear in your grow....

 

[ttystikk]

Me likey! This is the first time I've seen the price of heat sinks... and damn, they are proud of a silly chunk of aluminum, aren't they?

Suddenly, I'm thinking my lil experiment might save some coin on the build-up, let alone operation...

 

[gk skunky]

What voltage? 72?

 

[silvrsurfer77]

What voltage? 72?

Im doing the 36v

Me likey! This is the first time I've seen the price of heat sinks... and damn, they are proud of a silly chunk of aluminum, aren't they?

Suddenly, I'm thinking my lil experiment might save some coin on the build-up, let alone operation...

If you wan you can try the 4.85" wide heatsink its much cheaper slightly thinner and will need a fan. I have to the 5.8 is pricey, but its one heavy ass chunk of aluminum, the whole thing is pretty meaty, fins are thick and strong wont bend or flex at all.

 

[Getgrowingson]

Im building something very similar and I can tell you some pricing but it will vary with how you design the fixture.

(12) cxb 3590 @ $47.5ea from kingbrite = $570 ( then shipping options and possible paypal fee)
(3) Meanwell drivers @ $65ea = $195 (+tax&shipping)
(3) 5.88x36 heat sinks @ 62ea = $186 (+tax&shipping)


So your looking at $951 , plus lenses if you choose, plus tax shipping and fees, plus materials like wire, hardware, thermal paste, tools. If your starting with nothing I would say $1200 easily. Its a big investment but what made me go for it was less heat and more efficiency. When you factor in changing hps bulbs and extra AC for them, you make up the difference quickly.

Im basically doing the same set up but ran at 1.4A and dim-able and passively cooled. Still building it though. @1.4A Ive been told cxb 3590 gets 56% efficiency and at 700ma its almost 64% lumens per watt efficiency.

Mine is set up for dimming as well. If you look at the junction box pic you can see the top of the potentiometer and the big black tube looking thing is my limiting resistor. So I can dim down to 15% if I want. I just want to run as low of wattage as possible yet still get the yields I get with 1000w hps. Shooting for better quality as well of course. The chips are 72v version so each chip is pushing around 50 w

 

[gk skunky]

Mine is set up for dimming as well. If you look at the junction box pic you can see the top of the potentiometer and the big black tube looking thing is my limiting resistor. So I can dim down to 15% if I want. I just want to run as low of wattage as possible yet still get the yields I get with 1000w hps. Shooting for better quality as well of course. The chips are 72v version so each chip is pushing around 50 w

Good deal man. I'd expect a 1k killer then too. My 6-cxa 3070 z4s and a51s are cutting the cake so with the right genetics and know how should be no problem with your setup. I think you're good man. will be patiently watching.

 

[ttystikk]

If you wan you can try the 4.85" wide heatsink its much cheaper slightly thinner and will need a fan. I have to the 5.8 is pricey, but its one heavy ass chunk of aluminum, the whole thing is pretty meaty, fins are thick and strong wont bend or flex at all.

I dunno, man- I could swear we're building a light fixture, not a bridge! You growing under the I-95? LOL

Seriously, I smell opportunity for improvement.

 

[Stephenj37826]

Better get hlg185h c1400 if you want to run 36 volt cobs. 1 hlg 185h c700 will run 8 36v. Or 16 cobs and 2 c700 drivers.

 

[Getgrowingson]

I dunno, man- I could swear we're building a light fixture, not a bridge! You growing under the I-95? LOL

Seriously, I smell opportunity for improvement.

I could have used smaller heatsinks but when it comes to growing people want redundancy. What happens if you cheap out and use a smaller heatsink and you loose a fan or something? Your cobs cook and there goes the cob(s). At least what I have found its better to play it safe then run UN necessary risks

 

[ttystikk]

I could have used smaller heatsinks but when it comes to growing people want redundancy. What happens if you cheap out and use a smaller heatsink and you loose a fan or something? Your cobs cook and there goes the cob(s). At least what I have found its better to play it safe then run UN necessary risks

Lots of ways to skin the redundancy/fault tolerance cat. Not saying your big heat sink is bad or wrong, I'm just surprised at how expensive it was. I mean, no moving parts!

 

[silvrsurfer77]

I dunno, man- I could swear we're building a light fixture, not a bridge! You growing under the I-95? LOL

Seriously, I smell opportunity for improvement.

LOL well, from what the more experienced ppl told me on here the 5.8" profile has a thicker base and fins for better heat dissipation. I do wish they were a bit lighter in weight. But hey if they dont work I can build a bridge ;P

The 4.8" should be solid and work fine, you will have to put fans on them though from what ive been told.

 

[ttystikk]

LOL well, from what the more experienced ppl told me on here the 5.8" profile has a thicker base and fins for better heat dissipation. I do wish they were a bit lighter in weight. But hey if they dont work I can build a bridge ;P

The 4.8" should be solid and work fine, you will have to put fans on them though from what ive been told.

Just you wait until you see what I've got up my sleeve...

 

[silvrsurfer77]

I could have used smaller heatsinks but when it comes to growing people want redundancy. What happens if you cheap out and use a smaller heatsink and you loose a fan or something? Your cobs cook and there goes the cob(s). At least what I have found its better to play it safe then run UN necessary risks

Thats why I opted for the 5.88" also, I prefer passively cooled and since I have tents with inline fans hooked up, you get lots of air flow anyways. I personally dont mind the extra weight to have more security against failure and better cooling efficiency. All in all the only draw back if any to our lights is weight and initial cost. I can deal with those to get 50+ efficiency lol

 

[silvrsurfer77]

Just you wait until you see what I've got up my sleeve...

Look forward to seeing it haha.

What you could do is small 6"x6" heat sinks for each cob and build and aluminum housing for all of it, would def cut weight and id have to think cost also, just more labor intensive

 

[silvrsurfer77]

Better get hlg185h c1400 if you want to run 36 volt cobs. 1 hlg 185h c700 will run 8 36v. Or 16 cobs and 2 c700 drivers.

hlg185h c1400b are my drivers per 4 cxb3590 36v. I would run more I would to 8 at 700ma if I had the money for all those cobs lol....@ 4per driver @1.4a its 56% efficiency as opposed to 64% at 700ma. 8% difference and huge price diff, so for me its the happy medium value point