100 watt light bulb vaporizer costs about a dollar,takes 15 minutes to make and works like a charm.Remove last thread and tip of base on bulb,use welding rod or thin screwdriver and break out the glass filament base.Clean all broken pieces of glass out,next take a plastic bottle cap from a 16oz water bottle drill two small holes in the top for two plastic straws to fit tightly in holes,cut one straw 3 inches and insert in cap,next cut 6 inch straw and do likewise.put small amount of herb inside,screw on cap and heat.I use a votive candle for a heat source,the bulb gets hot wear gloves and be sure to use at least 100 watt bulb to handle heat.Peace to all