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.
early 15c., act of enjoying, from Middle French fruition and directly from Late Latin fruitionem (nominative fruitio) enjoyment, noun of action from Latin frui to use, enjoy.. Sense of act or state of bearing fruit is first recorded 1885 by mistaken association with fruit; figurative sense is from 1889.