These designs combined the concepts of fluorescence and incandescence. More efficient light sources, such as fluorescent lamps and LEDs, do not function by incandescence. These radioisotopes excite the surrounding material to incandescence. Vapor from the chamber burns, heating a mantle to incandescence and also providing heat. Sunlight is the incandescence of the "white hot" surface of the sun. Moreover, when heated to incandescence, the thorium volatilizes its in-growth radio-daughters, particularly radium-224. It reacts with incandescence with cadmium, magnesium and zinc chlorates. Incandescence is a special case of thermal radiation. In 1761, Ebenezer Kinnersley demonstrated heating a wire to incandescence. The light is produced by a combination of incandescence and candoluminescence. Most of all they are about the incandescence of light and color. The colour of simple incandescence is due to black-body radiation. Instead, they used a ceramic rod that was heated to incandescence. I don't know how to explain his incandescence. In December 2006 he recorded "Incandescence" with the same trio.