Airwalker16
Well-Known Member
Well I'm using 2 per 30" so they oughtta work just fine.
Mau5Capades: builds & grow journal
- Thread starter Growmau5
- Start date
sure but you asked about 140mm fans and I showed you a really sweet price\performance point.
WHY DONT YOU READ THE FRIGGIN SPECS AND TRY TO UNDERSTAND ?
Why are folks always recommending the B version drivers?
I got a A version 240W 1750mA with the internal pot and I think it's totally fine.
Why do you go through the hassles with connecting pots etc. if there's already one there? For the wider dimming range? (The one I have with the internal pot goes from 850mA to 1750mA, so 50-100%)
I got a A version 240W 1750mA with the internal pot and I think it's totally fine.
Why do you go through the hassles with connecting pots etc. if there's already one there? For the wider dimming range? (The one I have with the internal pot goes from 850mA to 1750mA, so 50-100%)
nevergoodenuf
Well-Known Member
^ For me, I am putting my drivers in the attic. The B will let me use a dimming panel in my room, but keep all the driver heat outside. Plus it would be harder to dim if I had to climb on a ladder every time I what to change them.
Greengenes707
Well-Known Member
There are a few reason, many to most of them, just personal choice.
-Wider dimming range,
-Connect multiple drivers to one knob
-Cool knob options(aluminum, anodized, gold...)
-Use of PWM and automated controllers(sunrise/sunset programs, high heat power down)
-Not have to get on top of the driver and use a little screwdriver like the A...external of the room even/ease of access.
-Cause that's what people they are following used
If someone considers installing a pot a hassle...than it's clearly not for them. It should not be a deterrent, if they installed the driver, they can do the pot in 10 seconds. It's just a choice.
Airwalker16
Well-Known Member
Because it's 2 wires you solderand heatshrink
Airwalker16
Well-Known Member
Are you saying thosee $14 fan ARE a good price? If I was buying 1 or 2 ya. But dude I need 6.
these are more than two times the performance of the nexus fan. look at CFM and static head pressure.
Airwalker16
Well-Known Member
I realize that man. But I need to use 2 so I don't have it on top of a cob directly above that hot spot. So that's why I'll just use 2 and get the same power as I would with your 1. And save $10. Or $66 if I used 6 of them.
Airwalker16
Well-Known Member
I'm using 30" 5.886 with 3 Cobs on them. So one will be right in the center you see. Unlike a 4 cob where you could use that fan in the center and it would work great.
on a 30" heatsink one in the center is MORE than adequate.
Airwalker16
Well-Known Member
It'll be right above a cob :/
so what ? it will run a bit cooler than the other two, which is better.
on the other hand why are you doing 30" with three cobs ? go longer, maybe 3feet to a meter and do 4 cobs and use just one quality fan .....
its called creative thinking
Airwalker16
Well-Known Member
Because I'm doing 9 cobs. I want a spread so they're on L rails to be 30x36. Each 3 cobbed HS on a 240-2100 equivalent pairui lgsu250-2100.
Airwalker16
Well-Known Member
Like this. Terrible drawing. I was just trying a few spots to mount my drivers.
Attachments
under those parameters I would build two 40" (about 1 meter long) heatsink bars with 4 cobs on each, and use one hlg-185H-c on each heatsink bar. (have the heatsinks go the long way, not the short way). that will give you essentially the same evenly distributed coverage.
1 heatsink, 1 hlg driver, 1 fan .... get it ?
ttystikk
Well-Known Member
For me, I'm keeping my options open for automated dimming in the future.
ttystikk
Well-Known Member
What driver heat? Serious question; can you quantify?
Greengenes707
Well-Known Member
Drivers have an efficiency just like a cob...Think about what is the other half of the efficiency percentage
Drivers and fan motors usually have the highest operating temps of any components on the build.
nevergoodenuf
Well-Known Member
By next week I will have 4 CEN100-36s, 3 HLG320s, 2 HLG240s, and 4 HLG120-1050s powering my 80 square foot room. My dehumidifier throws out enough heat to kick on my mini split. Every bit counts.