You can't focus light from a single source with just magnifying glasses at different positions onto the same point. You can try it with the sun, get two magnify

You can't focus light from a single source with just magnifying glasses at different positions onto the same point. You can try it with the sun, get two magnifying glasses and try to focus them on the same point at once, it's not possible. With the addition of some well placed mirrors though, that's possible.