LED ceiling light is an LED lighting product that is used as a ceiling light source. It is energy-saving, environmentally friendly and efficient. It is a popular LED lighting product on the market. This article mainly introduces the knowledge about the luminous intensity of LED ceiling light.
LED ceiling light luminous intensity unit:
Active illuminators such as LED ceiling lamps and incandescent lamps use candle light (CD) as the unit of luminous intensity. Reflective or penetrating objects use lumens (L) luminous flux units. The illuminance unit Lux is used in photography and other fields. These three units of measure are numerically equivalent, but need to be understood from different angles. For example, LCD projectors have a brightness (light flux) of 1600 lumens, and if projected onto a 60-inch (1 square meter) full-reflection screen, the illumination is 1600 lux. Assuming that the light exiting port is 1 cm away from the light source and the light exit opening area is 1 cm 2 , the luminous intensity of the light exit opening is 1600 CD. However, in fact, due to the loss of light propagation, reflection or loss of light-transmissive film, etc., the brightness of the LCD projector can generally reach 50%. According to the current application experience, the outdoor LED display screen needs to achieve a brightness of 4000CD/square meter or more in order to obtain an ideal display effect in daylight. Ordinary indoor LED, the maximum brightness can be about 700 ~ 2000 CD / square meter.
LED ceiling light luminous intensity is measured by:
Illuminance unit: Lux Note: 1Lux: refers to the illuminance when the luminous flux received per square meter is 1 lumen;
Luminous flux unit: Lumen;
Luminous intensity unit: Candle power.
The relationship between the illumination of the LED ceiling light and the luminosity and distance is: E (illuminance) = I (luminance) / r2 (distance square).
LED ceiling light luminous intensity unit:
Active illuminators such as LED ceiling lamps and incandescent lamps use candle light (CD) as the unit of luminous intensity. Reflective or penetrating objects use lumens (L) luminous flux units. The illuminance unit Lux is used in photography and other fields. These three units of measure are numerically equivalent, but need to be understood from different angles. For example, LCD projectors have a brightness (light flux) of 1600 lumens, and if projected onto a 60-inch (1 square meter) full-reflection screen, the illumination is 1600 lux. Assuming that the light exiting port is 1 cm away from the light source and the light exit opening area is 1 cm 2 , the luminous intensity of the light exit opening is 1600 CD. However, in fact, due to the loss of light propagation, reflection or loss of light-transmissive film, etc., the brightness of the LCD projector can generally reach 50%. According to the current application experience, the outdoor LED display screen needs to achieve a brightness of 4000CD/square meter or more in order to obtain an ideal display effect in daylight. Ordinary indoor LED, the maximum brightness can be about 700 ~ 2000 CD / square meter.
LED ceiling light luminous intensity is measured by:
Illuminance unit: Lux Note: 1Lux: refers to the illuminance when the luminous flux received per square meter is 1 lumen;
Luminous flux unit: Lumen;
Luminous intensity unit: Candle power.
The relationship between the illumination of the LED ceiling light and the luminosity and distance is: E (illuminance) = I (luminance) / r2 (distance square).
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