Yes I think they could make objects glow, or body parts... heh... I just imagined making small orbs of light sort of the way you can make small balls of flame with fire magic would be one way to do it.
Glad you like it! I decided to remove the black and white pattern under Iset's wings and do a simple gradient instead, and restrict the "freckles" to her head only, heh. I can also draw her broad collar in an extremely simplified fashion that is like a kid's costume version or something. I will still draw the complex version in my own drawings, but a simple one would be fine for the reference.