Low pressure sodium lamp, monochromatic yellow light the low-pressure sodium lamp the lps lamp was the first sodium lamp to be developed. It is known by its signature monochromatic yellow color. It is mostly used in india since it did not appeal in other markets due to its poor cmore...
range in size from 18W to 180W and average 14, 000 to 18, 000 hour lifetimes. They have excellent lumen maintenance but the longest warm up times from 7 to 15 minutes. LPS lamps feature the shortest re-strike time among HID sources only 3 to 12 seconds.more...