magnifying the light would be rocket science. Too much and you would vaporize it. That's why tin foil is bad along with mirrors. They concentrait the light and you get burn spots. To be more effective you need cool tubes and you can get them touching the plant. Can't get any more from a light than that.You would still need mylar reflctant. For some reason mylar or metalized plastic doesn't concentrait the light in one spot to burn. If you can't afford mylar. the back of metalized xmas paper is very cheap and works just as good