Sun is the primary source of heat here in the Earth. As time moves on, human developed new sources of heat and light. Some of it are the torches, lamps, candles and others
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...
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?