Professional Lighting Terms - Color Temperature

When the color of the light source is the same as the color emitted when the black body is heated to a certain temperature, the color temperature of the light source is referred to as the color temperature.

Conversion relationship 1 lux = 1 lumen luminous flux Uniformly distributed in an area of ​​1 square meter Illuminance 1 lumen = luminous intensity is 1 candela point light source, luminous flux emitted in unit solid angle 1 lux = luminous intensity 1 candela point light source Illumination on a spherical surface with a radius of 1 m. Cold light sources Light sources that use chemical and electrical energy, such as LEDs, EL, energy-saving lamps, fiber optics, fluorescent lamps, and electrodeless lamps.

Heat sources Light sources that use thermal energy, such as incandescent lamps, tungsten halogen lamps, high-pressure mercury lamps, metal halide lamps, and the like.