Just quickly turn the bulb on and off to switch between the flickering flame mode, the gravity-sensitive mode for lamps that may not be upright, general light mode for a warm, candlelit glow, or ...

Each light gives off a powerful yellowish glow, with the flickering effect giving a variance in the color. It’s similar to a real flame but without the safety hazard. Once fully charged they can ...

The light of the flame was examined with a Rowland’s grating. Whenever the circuit was closed both D lines were seen to widen. You have full access to this article via your institution.

Actress Katerina Lehou, right, as high priestess, lights the torch during the lighting ceremony of the Olympic flame in Ancient Olympia, southwestern Greece, Oct. 24, 2017.