HOME / Moogle News / Exhibition News

Basic knowledge of lighting

Moogle News 2025-06-30

One spectral characteristic

Light is an electromagnetic wave

The wavelength distribution of visible light is between 380-780nm

3. The wavelengths appear in red (700nm), orange (620nm), yellow (580nm), green (510nm), clear/blue (470nm), purple (420nm, etc.) from long to short

Roughly 7 types of colors In the white light of the sun, all visible spectra between 380-780nm are included

4. The wavelength above 740nm is infrared radiation

5. The wavelength below 400nm is ultraviolet radiation

Whatsapp:+86 134 1860 8878

II illuminance

The ratio of the light emitted onto the illuminated surface to the illuminated area is called illuminance

2. Represented by the symbol E, E=F/S.

3. Illumination indicates the strength of lighting Its unit is lux, which is the illuminance generated by 1 lumen of light on an area of 1 square meter

III Luminous flux and lumens

1. The light source radiates energy into the surrounding space. A portion of the radiant energy that enters the human eye causes the sensation of light, and the ratio of this portion of radiant energy to its radiation time is its power, which is called luminous flux

The unit of luminous flux is lumens (lm), and its accurate value is determined by a standard light bulb

3. Light intensity refers to the luminous flux emitted by a luminous body in a specific direction within a unit solid angle, with the symbol I and unit: Candela (cd)

4 Color temperature and color rendering index

If the color of a light source is the same as the color of an absolute blackbody when heated to a certain temperature, then we refer to the temperature of the absolute blackbody as the color temperature of the light source

Whatsapp:+86 134 1860 8878

2. The standard white light has a color temperature of 6500K, while incandescent lamps have a color temperature of 2800K. Light with low color temperature tends to be yellow, while light with high color temperature tends to be blue. For example, for searchlights, the color temperature emitted by light bulbs is usually 6200K. A typical 54 bar light, LED bar light, if warm white, is 3200K-3500K. Some customers will also choose the 3200K-6000K adjustable PA lamp. The 54 * 3W cold and warm white LED lamp is composed of 26 3200K warm white LED beads and 28 6000K positive white LED beads, which can meet various customer needs.

Whatsapp:+86 134 1860 8878

3. The color rendering ability of a light source on an object is called color rendering, and sunlight is generally used as the standard. The color rendering index of sunlight is the best, with a color rendering index of 100.

The color rendering index of other light sources is less than 100.