the only thing I can think of, if you don't have a heat source, maybe........you could leave some tinfoil next to a metal pot/bowl of water in the sun during the summer for like, 16 hours?
No.Ligtning is not a heat source.Unless u think that the electric of the lightning have heat.<<Previous answer:Yes.Fire is a heat source and a light source.If you were meaning light bulbs, then...