sodium vapour lamp

Low-pressure sodium vapour lamps sometimes are used in larger industrial darkrooms.

Generally, we use this method to determine the velocity of ultrasonic waves using Monochromatic sources like sodium vapour lamps.

Consequently high pressure sodium vapour lamps (which are still yellowish, but closer to golden white) are also used, at the cost of greater running expenses and increased light pollution.

The electrical connections of high-pressure sodium vapour lamps, the yellow lamps for street lighting, are made of niobium alloyed with 1% of zirconium.

Meera Bagh is a posh colony, with well-carpeted internal roads, manicured parks and sodium vapour lamps lighting the internal roads at night.

At night, a fifth lens, backed by a sodium vapour lamp, glared down from the ceiling, surrounded by a faint haze of steam where the dew tried to condense on it.

At T. Kallupatti, 35 street lights, seven sodium vapour lamps at a bus stand and a motor pumpset of 7.5 horsepower used for an overhead tank are powered by a biomass gasifier unit.

The Cantonment Board maintains about 4000 tubelight, 200 CFL and 800 sodium vapour lamp street-light points provided on roads, streets, and lanes under its management with the assistance of two maintenance gangs each having a truck with hydraulic ladder.