When focusing sunlight on a piece of paper, e.g. with magnifying glass, the paper will be charred and might eventually even burn (assuming low cloudiness). To what extent is the heat a result of the focus of the visible light, rather than to other parts of the electromagnetic spectrum (i.e. ultraviolet or infrared) that are invisible to the naked eye?
Related to “If visible light has more energy than microwaves, why isn't visible light dangerous?”