DiY LEDs - How to Power Them

REALSTYLES

Well-Known Member
Jeez dude.... SO HE KEEPS IT DIMMED. He could use that driver on a bigher setup later rather than buying a whole new driver.
I can't just watch you give bad advice to people and I have to speak up. You really haven't been making that long and now you're an expert giving out biased advice meaning you feel it's ok to run the cobs @2100ma you just don't get it with efficiency yet but one day you will
 

palmetto420

Member
Thanks for the input everyone. My situation is, the area, after moving things around, will be 12"x21"x36". In a couple of months, the area will be opened up to 18"x21"x48". At the beginning of next year, the area will be 18"x42"x48". Since ultimately the area will be the latter size, I would like to make one fixture that will be suitable for all the aforementioned spaces hence why I want to be able to dial it down and back up later to 200w...if this makes sense.
 

REALSTYLES

Well-Known Member
I have no idea what you are talking about, but this discussion was about a 1400ma HLG dimmed to 350ma for 4 cobs running at an efficiency closer to 70%.

Feel free to shout about that now.
Good luck but I have a light that's over 70% efficient CXB3590 72v 6500K DD bin @500ma and why would I have to yell or be mad? It's your light and you'll see for yourself what I'm talking about.
 

PurpleBuz

Well-Known Member
Thanks for the input everyone. My situation is, the area, after moving things around, will be 12"x21"x36". In a couple of months, the area will be opened up to 18"x21"x48". At the beginning of next year, the area will be 18"x42"x48". Since ultimately the area will be the latter size, I would like to make one fixture that will be suitable for all the aforementioned spaces hence why I want to be able to dial it down and back up later to 200w...if this makes sense.
I suggest that you build one light that fits your immediate space. Optimize the efficiency of the driver and the cobs for that light and that space.

I can guarantee that by the time you want to expand the space you will want an improved version. Generally better to have two 100W lights running with optimal efficiency rather than one that has to run at less than optimal driver efficiency.

Meanwell HLG drivers are best to run at over 60% of Vf capacity. At Dimmed down to 10% an hlg-185h-C drops from ~93% to ~79% that's huge.
 
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JorgeGonzales

Well-Known Member
I suggest that you build one light that fits your immediate space. Optimize the efficiency of the driver and the cobs for that light and that space.

I can guarantee that by the time you want to expand the space you will want an improved version. Generally better to have two 100W lights running with optimal efficiency rather than one that has to run at less than optimal driver efficiency.

Meanwell HLG drivers are best to run at over 60% of Vf capacity.
His Vf capacity is almost maxxed out.
 

Pulpit_

Well-Known Member
question.....
16 CXB 3590- 3500k, 36v running on 4 HLG- 185- 1400B. Each 40” heat sink has 4 cobs x 4 panels = 16 total. 2 drivers are going to a 50k pot with no resistor. I hooked up a kill a watt meter on the weekend, the one pair is drawing 395 watts from the wall however the other pair is only drawing 345 watts. Where is my problem ? they were both wired the same ?
 

Airwalker16

Well-Known Member
I can't just watch you give bad advice to people and I have to speak up. You really haven't been making that long and now you're an expert giving out biased advice meaning you feel it's ok to run the cobs @2100ma you just don't get it with efficiency yet but one day you will
Dude. I have tomatoes growing under CXB3070's @2100ma. Guess what realstyles? They're fucking HUGE. Mind you it's ONE COB per plant. And it is kicking ass. I don't need your fucking bad mouthing and your high and mighty bullshit. Advice is advice. He asked for some. I gave him some. Quit thinking you're so much smarter than everyone else, cause you're not. You don't sell lights, you don't post vids, and you SURE AS FUCK don't post enough on here anymore to be of any use. So seriously just stop talking to me. I don't wanna talk to you anymore. I've tried three times now to let this go, being polite but you insist on being a fucking asshole.1462811555650-372558418.jpg 1462811597626-636007543.jpg 1462811643554-310347738.jpg
 

JorgeGonzales

Well-Known Member
@palmetto420 You might want to go with individual heatsinks that you can spread out as your space grows. That's the only thing left you need to figure out.

If you want to go old school and easy you could get two 18 inch heatsinkusa bars, maybe the 4.6" serrated, two cobs on each and stick a 100mm fan or two on each heatsink.

Or individual sinks 12 inches a part on two fixtures, side by side for the small grow, and lengthwise for the 42"

Then you could build once and be done.
 

JorgeGonzales

Well-Known Member
question.....
16 CXB 3590- 3500k, 36v running on 4 HLG- 185- 1400B. Each 40” heat sink has 4 cobs x 4 panels = 16 total. 2 drivers are going to a 50k pot with no resistor. I hooked up a kill a watt meter on the weekend, the one pair is drawing 395 watts from the wall however the other pair is only drawing 345 watts. Where is my problem ? they were both wired the same ?
It's the pots. That's where the resistor you didn't use comes in, it makes sure you hit 50k+. Pots are like +/- 10%.
 

PurpleBuz

Well-Known Member
Dude. I have tomatoes growing under CXB3070's @2100ma. Guess what realstyles? They're fucking HUGE. Mind you it's ONE COB per plant. And it is kicking ass. I don't need your fucking bad mouthing and your high and mighty bullshit. Advice is advice. He asked for some. I gave him some. Quit thinking you're so much smarter than everyone else, cause you're not. You don't sell lights, you don't post vids, and you SURE AS FUCK don't post enough on here anymore to be of any use. So seriously just stop talking to me. I don't wanna talk to you anymore. I've tried three times now to let this go, being polite but you insist on being a fucking asshole.View attachment 3677283 View attachment 3677284 View attachment 3677285
those tomatoes look horrific, absolutely nothing to be proud of.
 

REALSTYLES

Well-Known Member
Dude. I have tomatoes growing under CXB3070's @2100ma. Guess what realstyles? They're fucking HUGE. Mind you it's ONE COB per plant. And it is kicking ass. I don't need your fucking bad mouthing and your high and mighty bullshit. Advice is advice. He asked for some. I gave him some. Quit thinking you're so much smarter than everyone else, cause you're not. You don't sell lights, you don't post vids, and you SURE AS FUCK don't post enough on here anymore to be of any use. So seriously just stop talking to me. I don't wanna talk to you anymore. I've tried three times now to let this go, being polite but you insist on being a fucking asshole.View attachment 3677283 View attachment 3677284 View attachment 3677285
You can't compare tomatoes to cannabis they are close but not the same and 3070's are not 3590's either my only argument is tell people to run 2100ma is a bad idea and @JorgeGonzales I'm not name calling he is that shows me he can't handle what I'm saying.
 

Airwalker16

Well-Known Member
those tomatoes look horrific, absolutely nothing to be proud of.
You're fuckin high dude... they're Heirloom tomatoes and the stems are enormous, growth is long and vigorous, and the leaves are ALL GREEN clear to the bottom, besides ONE which for some reason decided not to happen Gfy. Seriously @PurpleBuz you've had it our for me for a while now. Wtf is your problem? Show me what a 6 different kinds of heirlooms are "supposed" to look like? You're just trying to throw a punch in. Just to be an asshole.
 
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