High- and Low-Pressure Sodium Lamp
Lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a sodium vapor that is contained in a transparent bulb.
Sodium Gas Discharge Lamps
Sodium gas discharge lamps can be distinguished in two main groups: low-pressure sodium lamps in which the gas pressure is very low (0.7 Pa or 7.10−6 atm) and high-pressure sodium lamps in which the gas pressure is a factor 10,000–100,000 times higher (10–100 kPa); [2, 3, 4]. Because their construction and performance is in many ways different, they are dealt with in two different sections of this entry.
Low-Pressure Sodium Lamps
Low-pressure sodium lamps belong to the group of high-intensity discharge (HID) lamps, because they are available in high-light output (and thus high-luminous-intensity) versions. All low-pressure gas discharge lamps have in common the fact that they are long. Low-pressure sodium lamps are highly efficient lamps with a good...
- 1.Van Bommel, W.J.M., Rouhana, A.: Lighting Hardware: Lamps, Gear, Luminaires, Controls. Course book, Philips Lighting, Eindhoven (2012)Google Scholar
- 2.Coaton, J.R., Marsden, A.M.: Lamps and Lighting, 4th edn. Arnold, London (1997)Google Scholar
- 3.DiLaura, D.L., Houser, K., Mistrick, R., Steffy, G.: Illuminating Engineering Society of North America, IESNA,New York, 10th edn (2011)Google Scholar