Solar rat man...I kinda like the idea myself, it'd make for a great surprise attack. Imagine it: You're a criminal and you've got this guy cornered, it looks like it'll be over once you put a bullet between his eyes, then suddenly he's glowing. Why the fuck is he glowing? Before you can question this you're hit with a face full of solar radiation and sent flying. The last things you see and hear before you pass out would be this guy stumbling away while tiredly muttering how he "doesn't get paid enough for this shit".