Light and heat are both forms of radiant energy. Naturally light can vaporise water. It's not as powerful* as heat but that just means you need more of it. * T

Light and heat are both forms of radiant energy. Naturally light can vaporise water. It's not as powerful* as heat but that just means you need more of it. * There is a formula which involves energy and the frequency of electromagnetic radiation. You could Google for it.