CXB3070 vs CLU048-1212 heat?

[rebeleye]

Hey everyone,

I'm about to build my own 4 x 36v cob setup for a small 2x4x5 space.

I'm wondering if the CXB3070 or CLU048-1212 would be cooler?

Let's say everything running 4 @1400 ma.

Or would 8 CLU048-1212 @ 700 ma run cooler than 4x3070/CLU048 @1400 ma?

Heat is my real big problem for my setup as I can't exhaust to the outside.

 

[Airwalker16]

Hey everyone,

I'm about to build my own 4 x 36v cob setup for a small 2x4x5 space.

I'm wondering if the CXB3070 or CLU048-1212 would be cooler?

Let's say everything running 4 @1400 ma.

Or would 8 CLU048-1212 @ 700 ma run cooler than 4x3070/CLU048 @1400 ma?

Heat is my real big problem for my setup as I can't exhaust to the outside.

It'll run cooler per heatsinks if ran at 700ma. But 200watts of heat is 200watts of heat if same cobs are being used.

 

[Resinhound]

It's funny bean counters make all these COBs seem vastly different...

Both those COBs run at comparable amperage are going to produce comparable heat.

Unless ofc you are going to get a thermometer that reads to the hundredth of a degree.

COB manufacturers must love this shit, lol.

 

[weed-whacker]

this is a really good question, shame the other two don't wanna take you seriously


you and are both comparing more 1212 vs less 3590.... the question we seek is the efficiency percent of the cobs at those currents, same watts in but higher efficiency= less heat out


i have conflicting reports on the off of the citi cobs


hopefully more info will come to light soon

 

[churchhaze]

this is a really good question, shame the other two don't wanna take you seriously


you and are both comparing more 1212 vs less 3590.... the question we seek is the efficiency percent of the cobs at those currents, same watts in but higher efficiency= less heat out


i have conflicting reports on the off of the citi cobs


hopefully more info will come to light soon

Same watts in = same heat out. Higher efficiency lets you to get the same amount of light for less watts in, but all the watts in have to go somewhere.

 

[CobKits]

i havent tested a 3070 on the bench, but knowing what we know about 3070 relative to 3590 i would wager 1212 vs 3070 would be a dead heat, maybe a very slight efficiency advantage to the 3070 at twice the price. 3070 would prob be better below 50W and 1212 better above

 

[weed-whacker]

Same watts in = same heat out. Higher efficiency lets you to get the same amount of light for less watts in, but all the watts in have to go somewhere.

yeah but he is comparing 2x 1212@ 700mA vs 1x3070@ 1400mA in regard to heat sink sizing, so it would seem to be a question of off % to calculate total heat watts for the sink, no?

 

[CobKits]

watts are watts. any light watts bouncing around a room will become heat as surfaces absorb them

 

[churchhaze]

yeah but he is comparing 2x 1212@ 700mA vs 1x3070@ 1400mA in regard to heat sink sizing, so it would seem to be a question of off % to calculate total heat watts for the sink, no?

If calculating the heat sink, then yes, you're only really concerned with the conductive heat part.

 

[weed-whacker]

If calculating the heat sink, then yes, you're only really concerned with the conductive heat part.

yeah, i looked back at the OPs question seems i misunderstood it, he is asking about total heat so my comment is moot.

thanks

 

[rebeleye]

I think I might end up running 4 x CXB3070@1050ma. I only ended up getting a 4 3/8" x 36" heatsink so running my lights in a 4x4 configuration isn't going to be doable..I had the option to get a 6" inch heatsink with 2" fins but boy that sucker was heavy, it seemed overkill. My next question is if I can even run @1400 on that size heatsink which I have asked in a new thread. My math says yes, but I always value others experience and input on the matter. Thanks for all the responses.

 

[Airwalker16]

200 watts of cobs does not translate to 200 watts of heat. If that were true a 1000 watt hps bare bulb would give off the same amount of heat as 1000 watts of cob led. With 200 watts being fed to 8 cobs he should be over 60% efficient which means less than 40% wasted watts and wasted watts=heat... some of that 60% efficient light will be absorbed by walls or grow tents or whatever and turned into head of course, but not enough to claim x amount of light = x amount of heat...

Which is why I said "if the same cobs are being used". I know there are wall watts and then heat watts. 2 different things.

 

[Airwalker16]

So ya...

 

[a mongo frog]

Holy fuck dude.........

 

[a mongo frog]

OMG dude.....

 

[a mongo frog]

OMG dude what?

Ahhhhh, ohhhhh nothing, cary on.

 

[CobKits]

If that were true a 1000 watt hps bare bulb would give off the same amount of heat as 1000 watts of cob led.

lock both of those setups in a closet and see how they compare

 

[a mongo frog]

Oh snap!!!!!!!!!

 

[HalfBee]

Schrodinger's COBs...

 

[a mongo frog]

600 watt bare bulb hps (pulling 618 watts at the wall) 5x5 tent all vents closed ambient temperature outside tent 71f, temperature inside tent after 2 hours 113f. 500 watt heater (505 watts at the wall, couldn't find a 600 watt heater) 5x5 tent all vents closed in same room (my garage) temperature inside tent after 2 hours 133f. Both tests were done at the same exact time same room same ambient temperature outside tent obviously. In a closet 700 +or- watts of heat is going to make it pretty hot as is 400 +or- watts of heat...

Yea but, how much did you yield?