PHILIPS TUBULAR Sodium Lamp

Low pressure sodium lamp, monochromatic yellow light
the low-pressure sodium lamp
the lps lamp was the first sodium lamp to be developed. It is known by its signature monochromatic yellow color. It is mostly used in india since it did not appeal in other markets due to its poor cri or color rendering. It is among the most efficient lamps in the world because it uses all the current it gets to create light at the most sensitive color (frequency) to the human eye. An incandescent lamp in contrast creates light at all frequencies from infrared (non-visible) to uv at the other end of the spectrum. The energy used to make non-visible light is a waste of energy since it does not help do the principle job of an electric light. The lps lamp is also called a sox lamp (so for sodium)
advantages:
- very efficient lamp
- powerful lamp for use of large areas
- despite a warm up time of 5-10 minutes it restarts immediately if there is a brownout
- lumen output does not drop with age (such as in leds or incandescents)
disadvantages:
- worst color rendering of any lamp
- sodium is a hazardous material which can combust when exposed to air (such as if the bulb is broken in the trash)