How to Create Light Up Placeables Like This

https://neverwintervault.org/project/nwn1/hakpak/original-hakpak/jack-olanterns

I want to create my own jack o lanterns, but also things like glowing crystals, lamps, etc. I can make the model for the placeable, just can’t find info or a tutorial on how to make them have a ambient glow with the same interactive light the pumpkins in the link do.