Spawnling- He will only be frozen by sunlight, and it has to be direct. Or, in other words, able to see the sun. A good example is a window. He can be in a room that has light coming in from a window, but the square of direct sunlight coming through the window and projected on the wall/floor/ceiling/tacoshell will freeze him. So you can imagine him staying away from windows, skylights, etc. But just the presence of light isn't an issue, only Sunlight. Kinda like how sunlight burns vampires, except it freezes him instead. And when I said reflection, I mean that if you are sitting in the sun and care to be a jerk, you could probably reflect the light off of a shiny object and freeze him with it, whatever.