> without power Not entirely true, it still needs heat from the Sun, or in cases where the Sun isn't shining (night, or overcast[?]): > It can even do its de-

> without power Not entirely true, it still needs heat from the Sun, or in cases where the Sun isn't shining (night, or overcast[?]): > It can even do its de-icing work at night, using artificial lighting. Lights that put out as much power per square meter as the Sun, over as much area as a commercial aircraft, are not going to be light on power requirements. The article does not actually specify how much light is required to melt the thin film of ice at the boundary.