References
- DeGrootJ. and van VlietJ. 1986. The high pressure sodium lamp. Deventer: Philips Technical Library.
- GraserW. 1990. Improving the life performance of high CRI HPS lamps. In IESNA Annual Conference Technical Papers. New York: Illuminating Engineering Society of North America: 842–855.
- van de WeijerM.H.A. 1965. In, High Pressure Mercury Vapour Lamps and Their Applications, edited by ElenbaasW.. Philips Technical Library, p. 126.
Reference
- GraserW. 1990. Improving the life performance of high CRI HPS lamps. In IESNA Annual Conference Technical Papers. New York: Illuminating Engineering Society of North America: 842–855.
- DeGrootJ., and van VlietJ. 1986. The high pressure sodium lamp. Deventer: Philips Technical Library.