How make a material shine/glow only in the dark?

Hi guys!
I want my character’s eyes glow when he is in a dark place (like a cat eye) ^^
There’s any way i can do that to a material?

Thanks for the attention!

Hi,

there are several options. For example i would use a triggervolume to mark the dark areas and while entering the volume, fade in and out an parameter that increase/decrease the emission of the material.

It’s a nice idea, thanks!