COB Manufacturers other than CREE or BRIDGELUX

Which led brand /manufacturer do you use ?

  • cree

    Votes: 98 58.0%

  • bridgelux

    Votes: 48 28.4%

  • sharp

    Votes: 1 0.6%

  • osram

    Votes: 4 2.4%

  • nichia

    Votes: 9 5.3%

  • toyonia

    Votes: 0 0.0%

  • citizen

    Votes: 32 18.9%
  • Total voters
    169
loftygoals

loftygoals

Well-Known Member
My setup is not actively water chilled. I run a car radiator and a 12V car radiator fan (at 5V so its barely audible).

Water pump: 28w (Eheim 1250)
Rad fan: 35w (80w "universal" 16 inch fan running at 5V)

Total 63w.

To cool 3600w of COBs that's not too bad. Under 2% of total power draw is for water cooling the lights.

In an active setup like ttystikk's he's using a water chiller in place of (or in addition to?) aircon. Instead of using air as your medium of heat transfer, he uses water to transfer heat away from the grow. Water chillers are more efficient than aircon units so he probably is paying less for his cooling than someone using passive/active COB heatsinks but then running aircon. He also has the advantage of getting more lumens with the cooler COBs. So it's a win/win.
 
bassman999

bassman999

Well-Known Member
loftygoals said:
My setup is not actively water chilled. I run a car radiator and a 12V car radiator fan (at 5V so its barely audible).

Water pump: 28w (Eheim 1250)
Rad fan: 35w (80w "universal" 16 inch fan running at 5V)

Total 63w.

To cool 3600w of COBs that's not too bad. Under 2% of total power draw is for water cooling the lights.

In an active setup like ttystikk's he's using a water chiller in place of (or in addition to?) aircon. Instead of using air as your medium of heat transfer, he uses water to transfer heat away from the grow. Water chillers are more efficient than aircon units so he probably is paying less for his cooling than someone using passive/active COB heatsinks but then running aircon. He also has the advantage of getting more lumens with the cooler COBs. So it's a win/win.
Click to expand...
^^^THIS^^^

I sold my chiller, but with a nice water bin it works great
 
ttystikk

ttystikk

Well-Known Member
CobKits said:
so when you say not actively cooled the cooling radiator is in the grow area or are you usin waterblocks on the cobs?
Click to expand...
As I understand it, she's using water blocks under the chips, then shedding heat to the atmosphere with a radiator and fan.

@loftygoals is the fan on your radiator pushing or sucking air through the radiator? In this case, sucking would be much more effective. The low pressure translates into a lower effective temperature, thus aiding cooling.
 
loftygoals

loftygoals

Well-Known Member
CobKits said:
so when you say not actively cooled the cooling radiator is in the grow area or are you using waterblocks on the cobs?
Click to expand...
Cobs are mounted directly onto the water blocks. Water gets pumped around a loop it goes something like this:

Pump -> Radiator -> Water blocks -> Pump

Water temp is around 28C going towards the radiator and 38C coming back in a 25C room.

By actively water chilled I mean with a water chiller. I just have a radiator which is cooled with ambient air flowing over it.

ttystikk said:
As I understand it, she's using water blocks under the chips, then shedding heat to the atmosphere with a radiator and fan.

@loftygoals is the fan on your radiator pushing or sucking air through the radiator? In this case, sucking would be much more effective. The low pressure translates into a lower effective temperature, thus aiding cooling.
Click to expand...
It's pushing. In computer water cooling pushing/pulling has been shown to make no difference so I have always gone with push (because you can use filter on the fan intake to stop the rad getting gummed up with dust). Most of my setup is based on what I've done in computer water cooling.
 
ttystikk

ttystikk

Well-Known Member
loftygoals said:
Cobs are mounted directly onto the water blocks. Water gets pumped around a loop it goes something like this:

Pump -> Radiator -> Water blocks -> Pump

Water temp is around 28C going towards the radiator and 38C coming back in a 25C room.

By actively water chilled I mean with a water chiller. I just have a radiator which is cooled with ambient air flowing over it.



It's pushing. In computer water cooling pushing/pulling has been shown to make no difference so I have always gone with push (because you can use filter on the fan intake to stop the rad getting gummed up with dust). Most of my setup is based on what I've done in computer water cooling.
Click to expand...
Physics would argue otherwise, as has my own personal experience. It's also splitting hairs, considering the heat loads involved.

I only hooked mine up to a chiller because I had one.
 
loftygoals

loftygoals

Well-Known Member
ttystikk said:
@loftygoals you might consider flipping your fan around and placing your radiator outside come winter; you might well get your temps down near where I'm running mine!
Click to expand...
I wish I could. That would be the ideal setup but this is the best I'm going to manage until I decide to remodel the whole house (not feasible for 2-3 years).
 
loftygoals

loftygoals

Well-Known Member
ttystikk said:
You can't run a pair of water lines out the window?
Click to expand...
Lol!!

Im in a loft! I have no windows (unless I go through the floor)! And I'm all about ultra stealth!

I've checked my place out with a FLIR camera to eradicate any heat sig. I have my fans on variacs to keep the noise minimal. I've got my air double carbon filtered and vent into my house so there is literally no trace of my grow from outside.

How am I going to explain a massive car radiator sticking out of the window?!

If I was going to try to put my rad outside I would have to build a shed like enclosure next to the house to accommodate a few large radiators and would try to run them passively. Not realistic at the moment!
 
coreywebster

coreywebster

Well-Known Member
loftygoals said:
Just ordered 250x Citizen CLU046-1212 units. 180 for flower (3500k), 30 for veg (5000k) and 40 more (3500k) to play with side lighting :)

Gonna have some fun with these things :D

@Will Thayer helped me out on sourcing. At £2.20 each after delivery and considering I already have suitable Meanwell HLG-600h drivers I had to jump on them. Thanks a lot!
Click to expand...
From Estonia?
 
ttystikk

ttystikk

Well-Known Member
loftygoals said:
Lol!!

Im in a loft! I have no windows (unless I go through the floor)! And I'm all about ultra stealth!

I've checked my place out with a FLIR camera to eradicate any heat sig. I have my fans on variacs to keep the noise minimal. I've got my air double carbon filtered and vent into my house so there is literally no trace of my grow from outside.

How am I going to explain a massive car radiator sticking out of the window?!

If I was going to try to put my rad outside I would have to build a shed like enclosure next to the house to accommodate a few large radiators and would try to run them passively. Not realistic at the moment!
Click to expand...
I was not aware of the extent of your stealth.

I'll keep brainstorming, it's what I do. Lol
 
loftygoals

loftygoals

Well-Known Member
CobKits said:
its only sketchy if it doesnt look normal

YES thats my hot wife in the shower and NO you cant go in there she requires 12 hours of intense showering when im done with her
Click to expand...
Bahahaha!

I'm already utilising bathroom vents to their max. Fresh air comes into the loft via what was the bathroom extractor vent situated in the eaves of the roof. Warm air is extracted out of the grow room via an inline carbon filter which leads to the old extractor vent in the bathroom ceiling... My bathroom is always warm!! But there's signs of my grow from outside, and no smell in the house at all :)

I've given a lot of thought to situating my rad outside. Realistically it ain't happening anytime soon.
 
You must log in or register to reply here.
Top