[itishappy]

Without heat? No. With less heat? Yes.

Light is energy, and filming requires a lot of light, so there's always going to be significant visible energy available to heat things up. (Unless you're filming a mirror, but in that case why are you illuminating it?)

Incandescent lights emit a lot of invisible energy in the form of infrared radiation, while LEDs are designed to emit most of their energy in the visible spectrum. This means LEDs need less energy to produce the same visual effect, and therefore impart less heat. Another option is to slap a "hot mirror" or "cold mirror" (like the one from the dentist's office) in front of your lights that separates the visible from IR.

https://ogc-jp.com/en/wp-content/uploads/2017/08/cat12.jpg

https://www.edmundoptics.com/c/hot-cold-mirrors/989/

[hex4def6]

I wonder why they don't use hot / cold mirrors to separate the visible light from the IR. You could bounce the IR energy (upwards(?) or into a heatsink) so that the scene isn't as intensely heated.

[KennyBlanken]

There are in fact theater lights at least as early as the 90's with cold mirrors to direct IR to a heatsink, to extend the life of gobos and gels, and put less IR on actors.

Cold mirrors that large are expensive and it's just complexity/something to break or need servicing (cleaning) so I doubt they were stocked much by rental companies or saw much usage in tv/movie production.

[jacquesm]

It's hard to get the same effect with LED though due to spectral differences.