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.