Light source
Illumination light sources have different photoelectric characteristics due to their different lighting conditions. In order to select lighting sources correctly, it is necessary to understand their electrical characteristics, photoelectric characteristics and applicable occasions.
1. Classification of light source:
The classification of lighting sources is classified according to different forms of light emission. It can be divided into two categories: radiation source and gas discharge lighting source. The former uses electric current to pass through an electric wire to heat it to an incandescent state to emit visible light; the latter uses some element atoms to be excited by electrons to generate radiation.

2. Main characteristic indexes of commonly used lighting sources:


Type of lighting source
(Lm/W)
  Color rendering index Ra
  Color temperature
(K)