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.
Definition of joy. 1a : the emotion evoked by well-being, success, or good fortune or by the prospect of possessing what one desires : delightb : the expression or exhibition of such emotion : gaiety. 2 : a state of happiness or felicity : bliss.