Microwave lamps are lamps in which the light is produced by radiation from sulphur excited by microwaves in the presence of argon gas.
Performance: They offer a high efficiency of approximately 100 lm/W. The sulphur output has a correlated colour temperature of 6500 K and a colour rendering index above 80. The lamp is mercury free, has unequalled colour stability, superior lumen maintenance, short turn-on time, low infrared radiation, very low ultra-violet radiation, and long system life.
Applications: Their high lumen output make them suitable for indirect lighting often using light distribution system such as hollow light guides. They are very new lamps with limited applications so far.