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.
JOY, n. 1. The passion or emotion excited by the acquisition or expectation of good; that excitement of pleasurable feelings which is caused by success, good fortune,the gratification of desire or some good possessed, or by a rational prospect of possessing what we love or desire; gladness; exultation; exhilaration of spirits.