High-pressure sodium discharge lamp.

摘要

The invention relates to a high-pressure sodium discharge lamp which under nominal operating conditions radiates white light with a maximum colour rendering index Ra of more than 80. Since the wall load is above 80 W/cm<2> under nominal operating conditions, a colour temperature Tc of at least 2800 K can be achieved with a luminous efficacy of more than 40 lm/W. <IMAGE>