1. Light intensity (I)

The luminous flux emitted by a luminous body within a unit solid angle in a specified direction. Unit: Candela (cd)

2. Luminous flux (Ф)

The total amount of light emitted by the luminous body per second, that is, the amount of light emitted. Unit: Lumen (Lm)

3. Illumination (E)

The luminous flux of the luminous body illuminating the unit area of the illuminated object. Unit: Lux (Lm/m2)

4. Brightness (L)

The luminous flux per unit solid angle per unit area of a luminous body in a specific direction. Unit: nt(cd/m2)

5. Average life (h)

Refers to the number of hours when a batch of bulbs are lit until 50% of the bulbs are damaged.

6. Color rendering (Ra)

Compared with sunlight, the degree to which the light source presents the color of the object is called color rendering, which is the degree of vividness of the lighting color.

7. Color temperature (K)

It is expressed by the absolute temperature K (Kelvin), which is to heat a standard black body. When the temperature rises to a certain level, the color starts to change from red to light red, orange, white, blue and white, and blue, and gradually changes. Using this characteristic of light color change, when the light color of a light source is the same as the light color of a black body at a certain temperature, we call the absolute temperature of the black body at that time the color temperature of the light source.