Lighting Confused over Meanwell specs

[Bekay]

Planning to buy my components today for my first COB diy project. I have a 2.5'x2.5' tent. I plan on using 4,CXM 22's on 133mm pin heat sinks running at 1400mA for 74w each. Vf of 54v for each COB at this amperage. I think a Meanwell HLG-320H-C-1400B will fire all four.
Rated Power 320.6w
Constant Current Region 114v-229v
Open Circuit Voltage (max) 311v
Am I right in looking at the high end of the Constant Current Region for the combined Vf total maximum? I think the HLG-240 falls short for this design.
I read that 50w "is the sweet spot" to run these COB's but I think along the lines of cheaper to do 4 at 75w than 6 at 50w. As far as heat considerations, I continually run a carbon filter with a 6" inline fan so I guess that should keep the tent from overheating.
Advice and opinions welcome and respected friends.

 

[Unique]

@BigSm0 is the person to ask for that! He's The AutoCob Man!

 

[Bekay]

Thanks for the reply. The above datasheet is where I got the Vf data.

 

[Bekay]

@BigSm0 is the person to ask for that! He's The AutoCob Man!

Thanks @Unique , hopefully he will see your tag and chime in.

 

[WalterW]

@pop22
@Jimmyclone
Can we help out an fellow DIY'er here?

I think that what he is saying is sound, but I would rather listen to BigSm0, Jimmyclone and pop22, these guys know there stuff, and I am sure they will pop in sooner rather than later

 

[pop22]

That would be a perfect driver for your setup. Those Meanwell drivers run at their most efficient when driven to just about the max. And yes, running them at 75 watts works fine. The drop in efficiency is minimal, and your putting out a lot more photons. You can always build a second light later then run softer for the efficiency.

Planning to buy my components today for my first COB diy project. I have a 2.5'x2.5' tent. I plan on using 4,CXM 22's on 133mm pin heat sinks running at 1400mA for 74w each. Vf of 54v for each COB at this amperage. I think a Meanwell HLG-320H-C-1400B will fire all four.
Rated Power 320.6w
Constant Current Region 114v-229v
Open Circuit Voltage (max) 311v
Am I right in looking at the high end of the Constant Current Region for the combined Vf total maximum? I think the HLG-240 falls short for this design.
I read that 50w "is the sweet spot" to run these COB's but I think along the lines of cheaper to do 4 at 75w than 6 at 50w. As far as heat considerations, I continually run a carbon filter with a 6" inline fan so I guess that should keep the tent from overheating.
Advice and opinions welcome and respected friends.

 

[Jimmyclone]

That would be a perfect driver for your setup. Those Meanwell drivers run at their most efficient when driven to just about the max. And yes, running them at 75 watts works fine. The drop in efficiency is minimal, and your putting out a lot more photons. You can always build a second light later then run softer for the efficiency.

Pop beat me to it.... Ur bang on buddy.. That driver will be perfect.. Get the b version and add a 100k potentiometer with a 10k resistor is series and you will have 30-300w on tap buddy..
Cheers

 

[Bekay]

Thanks for the replies @WalterW , @pop22 and @Jimmyclone. It is the B (dimmable) version and a pot is in the cart too. Sounds like I'm ready to pull the trigger. It took a week of reading the forum and watching GrowMau5 on Youtube but for an old guy this is new stuff like reading datasheets for COB's and drivers and heatsinks (still foggy about calculating heat gain and dissipation). All fun to learn and our AFN members are the best.
Peace.

 

[Jimmyclone]

Thanks for the replies @WalterW , @pop22 and @Jimmyclone. It is the B (dimmable) version and a pot is in the cart too. Sounds like I'm ready to pull the trigger. It took a week of reading the forum and watching GrowMau5 on Youtube but for an old guy this is new stuff like reading datasheets for COB's and drivers and heatsinks (still foggy about calculating heat gain and dissipation). All fun to learn and our AFN members are the best.
Peace.

On the heatsinks, i would just get the biggest u can afford.. 133,140 or bigger if u can find them.. I know on alibaba that china is making 150,160&180mm ones now.. But how much and how long it will take to get is another thing.. The cooler u keep the cobs, the better they will perform for u..
Good. Luck

 

[pop22]

The 133mm heatsinks are good up to 75-80 watts each, they'll do fine. The problem with the bigger ones is bigger costs. Beyond the 133 passives, myself, I'd go with active heatsinks like Cobkits had on his lightengines. I 've a pair of them with Citi 1825 cobs, and they can potentially run at up to 175 watts each with these heatsinks, and the price is competitive with the passives. If Interested, look up Mechatronixs http://led-heatsink.com/

On the heatsinks, i would just get the biggest u can afford.. 133,140 or bigger if u can find them.. I know on alibaba that china is making 150,160&180mm ones now.. But how much and how long it will take to get is another thing.. The cooler u keep the cobs, the better they will perform for u..
Good. Luck