If you decide to make your own reflector, try to make one with thin sheet aluminum, like roof flashing. Shape it like \_/ with the bulb in the middle. Adjust the flaps on each side so you can see an image of the bulb on each side of the bulb. That will double the light from the bulb. AH Supply reflectors are better, increasing the light from the bulb by at least 2.7 to 1. I wouldn't use a aluminum foil lined section of pipe or anything else, because you couldn't then adjust the angles to get the most light.