My 1000w Hps Killer

[gk skunky]

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

Might as well just buy the artic cpu coolers like some of us use then. Cheap. Effective and fan already mounted. Only issue maybe use of cob holders. I've just never looked into if that would work together or not.

 

[Stephenj37826]

Might as well just buy the artic cpu coolers like some of us use then. Cheap. Effective and fan already mounted. Only issue maybe use of cob holders. I've just never looked into if that would work together or not.

Buy artic alpine 64 plus. Works with holders :^)

 

[gk skunky]

Buy artic alpine 64 plus. Works with holders :^)

Thank you sir! I only have experience with the 11s.

 

[ttystikk]

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

I did the same math and came to the same conclusion. Either we're both geniuses or we're both idiots, but at least we'll be in good company, lol

 

[Castaman]

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.

Very nice DIY. Is it enough one fan per fixture?

 

[coolbreez1]

Tax and shipping are important factors, shipping is 10% of the build cost for a single light, it would suck to have to pay tax on top of that.

 

[Getgrowingson]

Yea one fan per. I finished wiring last night. I was looking at everything once it was wired up. For some reason one of the strings of 4 seems to be not as bright as the other two. I am going to bring my ammeter home tonight and try and figure out why as they are all the same setup. Seems like the one driver is limiting the current for some reason. @SupraSPL hopefully you can provide some insight into why it could be doing this.

 

[churchhaze]

Yea one fan per. I finished wiring last night. I was looking at everything once it was wired up. For some reason one of the strings of 4 seems to be not as bright as the other two. I am going to bring my ammeter home tonight and try and figure out why as they are all the same setup. Seems like the one driver is limiting the current for some reason. @SupraSPL hopefully you can provide some insight into why it could be doing this.

Are all the dies on all the arrays lit?

 

[Getgrowingson]

Are all the dies on all the arrays lit?

Yea they are I can look into it. it's noticeably dimmer then the other two. I didn't have much time to troubleshoot it last night as it was late by the time I fired it up. Going to do some voltage checks and current checks when I get home I just don't understand why one would be dimmer then the other and if you know what else I should be looking into

 

[churchhaze]

It's hard to see whether all the dies are lit from that picture, but I'll take your word for it. Sometimes a few strings in a cob will go out causing its forward voltage at the desired current be higher. In cases where the power supply provides max voltage borderline to total Vf of cobs in string, a slight increase in Vf would mean limiting current.

 

[Getgrowingson]

It's hard to see whether all the dies are lit from that picture, but I'll take your word for it. Sometimes a few strings in a cob will go out causing its forward voltage at the desired current be higher. In cases where the power supply provides max voltage borderline to total Vf of cobs in string, a slight increase in Vf would mean limiting current.

Yea makes a lot of sense. I will double check when I get home tonight. I will check VF of each cob as well and see if one is higher then the others which if it's even a little higher because of the tight restrictions between my driver output voltage and the voltage of the string would cause it to do just that. I was thinking I could also take one Cob out of the circuit and power it up and see if they brighten up which would prove my voltage in the string is to high. That way I can prove the driver is fine and start t look into the cobs themselves. It's a pain to check voltages with the cob holders as there is no exposed terminals or anything to put the meter on or I would have done it last night. Any one have any household objects they use to push the levers up on the cob holders to get the wires in and out?

 

[Getgrowingson]

Figured out the culprit. I had all the positives and negatives of the dim wires tied together. Like all the positives to one point and the negatives to a other . the string voltage was 248v As soon as I disconnected them and let them float Not hooked up to anything they went up to 280v each. Waaay brighter. If there's no current flow from positive to negative or through a pot why is it lowering output current? Shouldn't having only the positives connected together the all the negatives tied together without being a complete circuit put out max A? Makes me wonder what's going on here. @churchhaze got any theories? Maybe the output voltage/current is different on the drivers causing current flow? Weird either way @stardustsailor any ideas?

 

[Getgrowingson]

And holy shit is that bright. Gotta be brighter then a 1000w hps when running full tilt. Jesus got little cob spots in my eyes even wearing sunglasses

 

[Getgrowingson]

I must admit when the dim wires were hooked up and thought it was at full power I was a little disappointed. But now all I gotta say is wow

 

[nvhak49]

So how are you going to hook up the dimmer wires now, I'm saving up for the same fixture, but always wondered how to wire up the drivers to the dimmer?

 

[ttystikk]

So how are you going to hook up the dimmer wires now, I'm saving up for the same fixture, but always wondered how to wire up the drivers to the dimmer?

How expensive is electrical power where you are?

 

[Getgrowingson]

You connect drivers in parallel and then in series you put the potentiometer. It's in the datasheet for a better explanation

 

[gk skunky]

And holy shit is that bright. Gotta be brighter then a 1000w hps when running full tilt. Jesus got little cob spots in my eyes even wearing sunglasses

LOL did that first time I illuminated my first cxa 3070. No glasses, directly facing me. Turned on. Turned off. Lol had Technicolor honeycombs in my vision for a couple minutes. LOL

 

[nvhak49]

How expensive is electrical power where you are?

It costs me right around 65$ or so a month to run my 1000w hps on 12/12 that's why I'm wanting to make a cob 1000w killer. I I'm not really sure what the rate is a month I'll have to look it up.

 

[Getgrowingson]

Well my baby is complete. Lenses installed wiring cleaned up and she's ready to go. Had it on for 2 hours last night hottest reading on heatsink was 28c which seems low enough for me. Lenses really concentrate the light where as before without the light would light the whole room now it's a tight beam.