Did you know that the theory behind neon sign technology dates back to 1675 before the age of electricity, when French astronomer Jean Picard noticed a faint glow in a mercury barometer tube. When the tube was shaken a glow called barometric light occurred. The cause of barometric light was not understood, but it was investigated. Later, when the principles of electricity were discovered, scientists were able to move forward towards the invention of many forms of lighting.
Lumiere in the Forest
The word in French to lighten up a room is éclairant
The French word for mercury is mercure