Lighting Kushdog needs COB

[BigSm0]

We have some pretty low temps here right now.28f outside, 45-50 in my building and in a tent with 350w of cobs which is equal to over 600w of hps in a 5x5 tent covered with multiple blankets the temps hit a high of 62 degrees. That's efficiency in a bad way. All light sources give off 2 things light and heat. 50+% efficiency cobs which I'm running is putting off a lot of light per watt but minimal heat. Epistar led panels are closer to 20% light and 80% heat. Pretty damn amazing.

Mechatronix makes very nice heatsinks. A lot better than the pin fins that are very common.

If your debating on going with cobs try a small setup first. Pick up some clu-048's and run them off an eBay driver driven real low like15-20 watts or even a repurposed mars driver on some flat aluminum with a fan near by. Check up on temps in the first few hours. If you like what you see you can pick up a better driver, cooling and mounting configuration.

 

[KushDog]

Awesome to see you want to expand. I also thought my tent was a little too hot.. then I bought an IR thermometer for a tenner. Turns out it was too cold. I had my thermo/hydro meter hanging at the hight of the light, not the canopy and was reading 3° higher than it actually was. Then I measured the canopy. The leaves are actually a few degrees colder than the air. Who knew.

That's interesting, gonna have to buy one of these now and check![/USER]

@Corgy

I've just seen they have a range called TD Silent Ecowatt which have an EC motor and can be dialed right down to 10% with apparently no humming. I'm going to have to check this out...

 

[KushDog]

So I've been doing a little bit of digging around and am thinking of this as a start

4 x Citizen CLU048 1212 being driven by a Meanwell HLG-185H-C1400B

or maybe even 5 of the Citizen's (the ones off ebay come in packs of 5 so I figure I might as well use them all) driven by a HLG-240H-C1400B (I might be extending the space sideways a little so this would probably fit best)

Anyone know if I've done the calculations correct? The real thing is going to be sourcing the pin type heatsinks, that's proving to be harder than I'd hoped...

If your debating on going with cobs try a small setup first

This seems very sensible....but I tend to go full bore when I get an idea in my head. :smoking:

 

[BigSm0]

You could also go with the hlg-185h-c1050 with 5 cobs. Boost in efficiency and a little drop in wattage.

 

[Corgy]

We have some pretty low temps here right now.28f outside, 45-50 in my building and in a tent with 350w of cobs which is equal to over 600w of hps in a 5x5 tent covered with multiple blankets the temps hit a high of 62 degrees. That's efficiency in a bad way. All light sources give off 2 things light and heat. 50+% efficiency cobs which I'm running is putting off a lot of light per watt but minimal heat. Epistar led panels are closer to 20% light and 80% heat. Pretty damn amazing.

The constant reference to a light source give off 2 things is not correct..... energy = light = heat = energy.
Every single watt used turns into heat sooner or later, or rather, whenever light is absorbed heat is produced as kinetic energy..... More here http://physics.stackexchange.com/questions/201286/is-heat-always-associated-with-light

It would be more correct to say that the most efficient LED's or COB's convert more energy to light which in turn is converted to heat when absorbed, rather than using a high percentage of the energy to produce heat directly thus missing the light phase.

The saving is in the reduced wattage needed to produce the same amount of light than a less efficient light source. The actual Watt draw at the plug is the amount of heat that will be generated by the light.

 

[Rapha El]

So I've been doing a little bit of digging around and am thinking of this as a start

4 x Citizen CLU048 1212 being driven by a Meanwell HLG-185H-C1400B

or maybe even 5 of the Citizen's (the ones off ebay come in packs of 5 so I figure I might as well use them all) driven by a HLG-240H-C1400B (I might be extending the space sideways a little so this would probably fit best)

Anyone know if I've done the calculations correct? The real thing is going to be sourcing the pin type heatsinks, that's proving to be harder than I'd hoped...



This seems very sensible....but I tend to go full bore when I get an idea in my head. :smoking:

Or your could keep the 5th cob as a replacement in case one of them breaks. That way you can just replace it quickly and maintain your consistent lighting.
That would be more important in parallel setups to not get a runaway effect but should also not be ignored in a series build.

 

[KushDog]

Right, here it is. Cranked up to full power (drawing 246 watts at the wall) this thing is BRIGHT! It also runs a little hotter than I'd hoped, I can keep the temp at 29 with a S&P Silent 350 running at max but I probably won't have it running full blast until flowering so hopefully it's going to be ok... Just waiting on some last minute bits to hang it better (and also straight) but am really keen to get some soil and seeds in there.

 

[2Stoned2Care]

Right, here it is. Cranked up to full power (drawing 246 watts at the wall) this thing is BRIGHT! It also runs a little hotter than I'd hoped, I can keep the temp at 29 with a S&P Silent 350 running at max but I probably won't have it running full blast until flowering so hopefully it's going to be ok... Just waiting on some last minute bits to hang it better (and also straight) but am really keen to get some soil and seeds in there.

Fantastic light bro awesome job.i love the fire extinguisher(better safe than sorry)

 

[BigSm0]

Right, here it is. Cranked up to full power (drawing 246 watts at the wall) this thing is BRIGHT! It also runs a little hotter than I'd hoped, I can keep the temp at 29 with a S&P Silent 350 running at max but I probably won't have it running full blast until flowering so hopefully it's going to be ok... Just waiting on some last minute bits to hang it better (and also straight) but am really keen to get some soil and seeds in there.

Looks great. It's still dumping over 900btu of heat. But now your getting a lot of light for that amount of energy too.

 

[KushDog]

Fantastic light bro awesome job.i love the fire extinguisher(better safe than sorry)

Yeah, I figure for the slight cost vs the possible benefit it'd be crazy not to have one!