Tell Me if it Works

6 of these on aluminum flat stock.
The space is 18" x 36" x 43"

tslonige said:

6 of these on aluminum flat stock.
The space is 18" x 36" x 43"

Citizen CLU048-1212 80CRI GEN6 – CobKits.com

cobkits.com

Click to expand...

There's so many other parameters to determine whether or not it'll work. What's the wattage going to these 6 Citi's? How thick and wide is the flat stock? How much are you using for each COB?
ANSWER those and add everything else you should be asking and we can get you in the right direction.

Airwalker16 said:

There's so many other parameters to determine whether or not it'll work. What's the wattage going to these 6 Citi's? How thick and wide is the flat stock? How much are you using for each COB?
ANSWER those and add everything else you should be asking and we can get you in the right direction.

Click to expand...

I am wanting to run them in a row mounted to a piece of 6" x 1/8" x 24" flat stock. I have 2 300 watt drivers but really only wanted to use 1 if it will push all 6. With that I felt a heat sink would not be necessary but I am no light guy and wanted opinions. Thx

tslonige said:

I am wanting to run them in a row mounted to a piece of 6" x 1/8" x 24" flat stock. I have 2 300 watt drivers but really only wanted to use 1 if it will push all 6. With that I felt a heat sink would not be necessary but I am no light guy and wanted opinions. Thx

Click to expand...

That piece of stock can handle MAYBE 50Watts. If moneys tight and heatsinks aren't easy for you to access, a few baking sheets is a much better choice than bar stock. 100w per sheet. 2 cobs a sheet.

tslonige said:

I am wanting to run them in a row mounted to a piece of 6" x 1/8" x 24" flat stock. I have 2 300 watt drivers but really only wanted to use 1 if it will push all 6. With that I felt a heat sink would not be necessary but I am no light guy and wanted opinions. Thx

Click to expand...

No, it wont work. To many watts and to little alu. Also cobs concentrate the heat much more than boards or strips. That amount of metal will do 70-80w of spread out softly run leds, but no way 50w cobs.

Airwalker16 said:

That piece of stock can handle MAYBE 50Watts. If moneys tight and heatsinks aren't easy for you to access, a few baking sheets is a much better choice than bar stock. 100w per sheet. 2 cobs a sheet.

Click to expand...

This is what I ended up with. I need a mount, bar stock, sheet pans, (what size)?
I actually have 14 of these COB's but think I only need 4 or 6 in a 18" x 36" x 43" tent.

Mean Well HLG-320H-24A 320W Single Output Switching LED Power Supply
Citizen CLU038-1210 cob led 3500k 90cri 98 watts max 2300ma max

Thank you

tslonige said:

This is what I ended up with. I need a mount, bar stock, sheet pans, (what size)?
I actually have 14 of these COB's but think I only need 4 or 6 in a 18" x 36" x 43" tent.

Mean Well HLG-320H-24A 320W Single Output Switching LED Power Supply
Citizen CLU038-1210 cob led 3500k 90cri 98 watts max 2300ma max

Thank you

Click to expand...

Honestly, if you have 14, use 14. The more you use, and the lower the current going to each one, the more efficient. Meaning more lumens per watt. You'll get more light, less heat, and WAY MORE spread.

tslonige said:

This is what I ended up with. I need a mount, bar stock, sheet pans, (what size)?
I actually have 14 of these COB's but think I only need 4 or 6 in a 18" x 36" x 43" tent.

Mean Well HLG-320H-24A 320W Single Output Switching LED Power Supply
Citizen CLU038-1210 cob led 3500k 90cri 98 watts max 2300ma max

Thank you

Click to expand...

Your cobs are 24V cobs I'm assuming?

From his link to the cobs....31v min, 39v max and that is a 24 v driver.

>CLU-1212 is a nominal 36V COB which can operate up to 2.76A max (approximately 100W). Best efficiency is seen below 50W with this chip.

tslonige said:

Citizen CLU038-1210 cob led 3500k 90cri 98 watts max 2300ma max

Click to expand...

That is a CLU-1210 chip in your next post, not a 1212 but its still 36 v. You have to be accurate on these LEDs and power supplies...can't post numbers willy nilly and get good advice

Damn that sucks. There's just no way ti use that driver then.

DCcan said:

From his link to the cobs....31v min, 39v max and that is a 24 v driver.

>CLU-1212 is a nominal 36V COB which can operate up to 2.76A max (approximately 100W). Best efficiency is seen below 50W with this chip.



That is a CLU-1210 chip in your next post, not a 1212 but its still 36 v. You have to be accurate on these LEDs and power supplies...can't post numbers willy nilly and get good advice

Click to expand...

I was originally going to purchase the CLU-1212 but ended up with the CLU-1210 chips. I totally missed the voltage issue. So I need a different driver, correct. I have $3 per chip in the 1210's so it is not a ton of money. I have $60 in the driver.

Recommend a driver to me so I can get this right please. Thanks

Ok, wish I would have found this first.lol

First, a plan, then cooling, then a driver. You have to determine radiant or active cooling for it, so aluminum sheets work best at low wattage, no fan
[email protected]=25.2 watt x 14 cobs= 352 watts
[email protected]=36.0 watt x14 etc
[email protected]=50.4 watt x 14 etc...

HLG-240H-36B, 36v 6.7a with a dimmer and passive pin cooling for 6-7 cobs
HLG-185H-36B 36v 5.2a with dimmer and aluminum sheets for 6-7 cobs
HLG-320H-36B 36 v 8.9a with dimmer and aluminum sheets for 14 cobs

Those might work, the math seems ok. Check for other drivers, there are a couple other good models out there.
I think those HLG 185s crank out a bit higher, you will need a dimmer with that

Don't go all in series with crazy high voltages like RapidLED says for its drivers, wire in parallel for simplicity .

DCcan said:

HLG-240H-36B, 36v 6.7a with a dimmer and passive pin cooling for 6-7 cobs
HLG-185H-36B 36v 5.2a with dimmer and aluminum sheets for 6-7 cobs
HLG-320H-36B 36 v 8.9a with dimmer and aluminum sheets for 14 cobs

Those might work, the math seems ok. Check for other drivers, there are a couple other good models out there.
I think those HLG 185s crank out a bit higher, you will need a dimmer with that

Click to expand...

As long as the amount of COBs he puts on any one of those drivers doesn't exceed the veros Max current, he can put as few of them or as MANY of them on any of them as he'd like

Yea, its easier to run a thicker supply line and branch off with smaller diameter wire to the cobs, and not have to run large currents thru the larger wires. Much easier to bend and make the connections.
There also is a thru current limit in the connectors, so you can't put as many as you want. Just up to max thru put the COB is rated for.
Some have alternate solder pads that are rated higher.
Plus, it's easier to re use a 36v driver down the road than a 300v driver. It takes all kinds of extra brain cells to work out what some of those will run.

DCcan said:

There also is a thru current limit in the connectors, so you can't put as many as you want. Just up to max thru put the COB is rated for.
Some have alternate solder pads that are rated higher.

Click to expand...

Airwalker16 said:

As long as the amount of COBs he puts on any one of those drivers doesn't exceed the veros Max current, he can put as few of them or as MANY of them on any of them as he'd like

Click to expand...

God I'm High as FK on a Cannagar, you already said that and betterer than me

Airwalker16 said:

As long as the amount of COBs he puts on any one of those drivers doesn't exceed the veros Max current, he can put as few of them or as MANY of them on any of them as he'd like

Click to expand...

How about this wired to the 24v? It looks like it will run the chips at 36v? What is your opinion


or this?