Randomblame
Well-Known Member
The biggest benefit is you can use the driver remotely and mount it outside of the tent. That removes another 20w of heat from your grow room and allows to use more light.
Help choosing most efficient cobs
- Thread starter flamingo666
- Start date
Salah82
Active Member
but for the Luminus CXM 22 the HBG 60-1050 is the right driver
Yeah im still trying to build a mad setup with all single driver cobs like in the video above.....something similar to that.
Salah82
Active Member
yeah we'll see......Still think im a go with the single Driver beauties hanging from the top.....Something similar to this......just with reflectors......21x lamps in a 8x4 + 8 lamps in a 100x100cm tent.
We'll see what happens my brothers!
Salah82
Active Member
Humple
Well-Known Member
Why? It adds additional cost and additional complexity, and will give you less light per watt. Multiple people are advising you against it. Don't make a mistake just because you got attached to your original plan.
Salah82
Active Member
I need to be able to be flexible, plug and play. Pull em when i need to, you feel me.....don't like the idea of the fixed rail all on a few drivers it is to stationary......when i need to pull the plug i literally just pull the plug.
Randomblame
Well-Known Member
There are many other things which are more important. The only benefit is the flexibillity with the hanging height but you need more rope ratchets and each driver needs its own powercord + plug. Most of the time we try anyway to get an even canopy so the different hights are only needed if you have big sativas next to small indikas and even that can also be done with 4 COB bars. With all COB's at the same height you get much better uniformity across the canopy.
At 65w each of these drivers release ~6,5w of heat into your grow room with 21pcs that's already 136,5w.
You could use 20pcs CXM22 COB's and 4pcs HLG-240H-48A(5 COB's in parallel, ~265w at the wall, sometimes 280w) to make 4 indipendent 265w bars. Each bar could be hung at its own height if you want so you get almost the same flexibillity and you can remove the heat released from the drivers which is IMO the biggest benefit. One could figure out how much more airflow it needs to remove that heat. Maybe you'll need a 6" exhaust fan instead a 5" one. Maybe you need a humidifier too with so much heat air tents to dry out quickly and with a high VPD you can quickly become problems.
At 65w each of these drivers release ~6,5w of heat into your grow room with 21pcs that's already 136,5w.
You could use 20pcs CXM22 COB's and 4pcs HLG-240H-48A(5 COB's in parallel, ~265w at the wall, sometimes 280w) to make 4 indipendent 265w bars. Each bar could be hung at its own height if you want so you get almost the same flexibillity and you can remove the heat released from the drivers which is IMO the biggest benefit. One could figure out how much more airflow it needs to remove that heat. Maybe you'll need a 6" exhaust fan instead a 5" one. Maybe you need a humidifier too with so much heat air tents to dry out quickly and with a high VPD you can quickly become problems.
CobKits
Well-Known Member
make sure you use bjbs if you want to mount reflectors- the mechas lack the 3rd and 4th hole for the reflectors with ideal holders
Humple
Well-Known Member
If you're talking about tear-down, pulling 20-22 plugs is in no way easier or faster than pulling 2-4 plugs. If you're talking about reducing the amount of light, it would make far more sense to dim the driver. So I'm still wondering why.
littlejacob
Well-Known Member
Hi! I was like you at first I wanted 4 independent lights to spread the light as much as possible! I ended with cxb3590 3500k with an HLG 185 1400b...i just use 4 heatsink you don't have to put all your COB on the same heatsink and since you can dim it very low it is ok for seedling to flower! There is NO difference between my diy and what you show us from tgl(except I can't switch off 1 COB only 4 at a time but as I said you can dim it at 10% so 20w!)
Have a lifted one
Have a lifted one
Airwalker16
Well-Known Member
Welcome back to the forums, my guy.
Salah82
Active Member
Where do you mount the external heat sink brother?
Salah82
Active Member
Alipapa already got me covered with a set when its time, thank you my man!
Salah82
Active Member
Man there is a lot to learn for sure.....!
Salah82
Active Member
I know your not a fan of these but whats your thoughts on this driver compare to the HBG 60-1050:
https://www.digikey.de/product-deta...9Boun2oJDZBbW4dDkf1ZAj_GYaHx7ijIaAhAOEALw_wcB
Randomblame
Well-Known Member
Same series but with up to 2Amps at 48vf. Can be used but you need probably a bit more distance to avoid issues. With 100w COB's I would start at 24-30" and than reduce the height slowly untill I see signs of heat/light stress. I dont know if 48vf is already it's maximum but most 50v COB's needs more than 48v at 2Amps.
Salah82
Active Member
Ok.....thank you.
Salah82
Active Member
Another thing my OG-LED Brothers......Anyone has any experience with the heatsinks from King Brite LED on Alibaba.
Viv Lu making me offers for CLU-48 heatsinks that also fit the Luminus CXM22??
Any experience with those dudes from china?!
CobKits
Well-Known Member
if youre in US i can match their prices after shipping.
if youre not in us they can prob do you better depending on size of order, etc
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