Remember when you were a kid, and you used a magnifying glass to kill bugs or something? I'm just wondering, if a fully-weaponized version of the same thing could be made? Like, on top of an APC, a large 'light-funnel' was directed towards the sun, using mirrors and magnifiers to focus the light in whatever direction you want. If so, it would be an effective weapon (during the day), since you don't need to reload and there's no real ammunition.