Argon has a lower glow voltage, argon helps the smaller lamps start at a lower voltage. The larger LPS lamps used in street lighting for the most part do not use argon. 2. LPS Development and Inventors: Low pressure sodium lamps were invented first in 1920 by Arthur H. Compton at Westinghouse.
1. the pleasure felt when having a good time. 2. act of receiving pleasure from something. 3. (law) the exercise of the legal right to enjoy the benefits of owning property. Familiarity information: ENJOYMENT used as a noun is uncommon.
Learner's definition of FUN. [noncount] 1. : someone or something that is amusing or enjoyable : an enjoyable experience or person. The game was a lot of fun. [=the game was very enjoyable] She's fun to be with. = It's fun to be with her. = It's fun being with her. [=her company is enjoyable] Picnics are great fun [=are very enjoyable] in good weather.