any auto part store should have atleast the one for a/c system might have to cruise around for the coolant stuff. the light is usually the overpriced part. i just used one of thoose 2 dollar black light bulbs from halloween (think safeway has em year round) and screwed it into a drop light. worked great. no point in going fancy unless you really want too. just had to edit... i think regular green antifreeze itself may glow...somebody correct me if im wrong.