Any relation to K rating and heat transfer?

[cjsparky]

Simple question...Will a 20K bulb transfer more/same/less heat to a tank then say a 10K bulb of the same wattage, and identical circumstances? Just a mild curiosity...

CJ

 

[enderg60]

short answer no

long answer yes but nothing you will ever notice.

 

[lilrobb]

EnderG60;481545 wrote: short answer no

long answer yes but nothing you will ever notice.

+1

Miniscule difference

 

[cjsparky]

ares;481557 wrote: certain bulbs will put out different levels of IR and UV, both can transmit heat. this is not nescessary related to bulb temp though, rather bulb quality IMO.

higher kelvin bulbs do generally produce less lumens/watt. given that all the energy has to be light or heat, I would expect a high kelvin bulb to produce more heat, not sure how MUCH heat that actually is though.

This was one of my thoughts, however, it is producing light...just at the higher spectrum...therefore farther away from the more visible white that our eyes see. AND farther away from the IR spectrum as well...

I guess it is a moot point however ;-p

 

[enderg60]

your thinking is backwards.

Higher kelvin bulbs(bluer) put out less PAR then lower kelvin(yellower) because blue light takes more energy to produce since it has a shorter wavelength(vibrating faster). So basically when your "making" red or yellow light it takes less input energy then blue or purple light. Thus when you have a fixed input wattage (150, 250 or 400 watts) you get less usable light out of bluer bulbs, and since more watts are used in producing the light of bluer bulbs you get less radiant heat.

 

[dakota9]

I completely disagree with most of what I see above. After years of running different K ratings, I experience much more heat from the lower K ratings than the higher. At 20K, my current Coralife fixture only gets warm to the touch, but the 10K coralife bulb (which is probably more like 8K) gets too hot to touch the fixture's top.

 

[lilrobb]

EnderG60;481590 wrote: more watts are used in producing the light of bluer bulbs you get less radiant heat.

Dakota9;481618 wrote: I completely disagree with most of what I see above. After years of running different K ratings, I experience much more heat from the lower K ratings than the higher. At 20K, my current Coralife fixture only gets warm to the touch, but the 10K coralife bulb (which is probably more like 8K) gets too hot to touch the fixture's top.

That's what he said...

 

[acroholic]

I would think that since lower K bulbs tend to produce more PAR, they would heat the tank up more since the intensity of the light they make reaching the tank is stronger. but whether this is enough to make an appreciable temp difference who knows?

Did that make sense, or is it just another rehash of what Ender said?

 

[dakota9]

LilRobb;481624 wrote: That's what he said...

......... I'd said "most of what I see above" </em>because of this one post I was in agreement with....