The size of the lighting area of the lamp depends on factors such as the lamp power, the angle of the lamp, the installation height and the performance of the lamp itself. 

1. Calculation method of the illumination area of a lamp

YOOGEE lighting The size of the illumination area of a lamp is calculated based on factors such as the power of the lamp and the performance of the lamp itself. To this end, the following formula needs to be used for calculation:

Illumination area = illuminance/light source brightness

Among them, illuminance refers to the luminous flux per unit area, and the commonly used unit is lux, expressed as lx; light source brightness refers to the luminous flux per unit area emitted by the light source, and the commonly used unit is candela, expressed as cd/m².

2. Factors affecting the illumination area of the lamp

1.) Lamp power: Generally speaking, the greater the lamp power, the larger the illumination area.

2.) Lamp angle: The angle of the lamp will affect the light gathering effect, and the lighting effect at different angles will also be different. For example, the lighting angle of lamps such as wall lamps, semiconductor lamps and hanging lamps is generally 30 to 60 degrees, while the lighting angle of fog lamps is 120 degrees.

3.)  Installation height: The illumination area of the lamp is also affected by the installation height. Generally speaking, the higher the height of the lamp, the larger the illumination area.

4.)  The performance of the lamp itself: Different types of lamps have different performances and different effects on the illumination area. For example, LED lamps are more energy-efficient, have a longer service life, and emit more uniform light than ordinary lamps.

3. Measurement of the illumination area of the lamp

YOOGEE lighting We can use a photometer to measure the illumination area of ​​the lamp. A photometer is usually composed of a light sensor and a measuring instrument, which is used to measure the illumination. The photometer can be fixed at the location where the test is required, and the instrument should be calibrated before the test. During the test, it is necessary to avoid artificial interference and measure at different heights and angles.

【Conclusion】    

YOOGEE lighting The illumination area of ​​a lamp refers to the size of the area that the light emitted by the lamp can illuminate. Its size depends on factors such as the lamp power, lamp angle, installation height and the performance of the lamp itself. We can use a photometer to measure the illumination area of ​​the lamp and then choose the appropriate lamp to achieve the lighting effect we need.

 How to calculate indoor lighting brightness?

YOOGEE lighting The calculation standard of indoor lighting brightness involves multiple factors, including the luminous flux, quantity, space utilization coefficient, maintenance coefficient and floor area of ​​lamps. Specifically, illuminance (lux Ix) can be calculated by dividing luminous flux (lumens lm) by area (square meters ㎡), that is, the average illuminance of 1 lux is the brightness of 1 lumen of luminous flux irradiated on an area of ​​1 square meter.

When calculating the average illuminance of the floor surface of a room, the luminous flux Φ of a single lamp can be multiplied by the number of lamps N, then multiplied by the space utilization coefficient CU and the maintenance coefficient K, and finally divided by the floor area (length x width), that is, the average illuminance Eav = luminous flux Φ of a single lamp x number of lamps NX space utilization coefficient CUx maintenance coefficient K: floor area (length x width) In addition, illuminance is related to the human eye's perception of light.

Brightness is more inclined to the human eye's perception of light, while illuminance is the actual amount of light emitted by the lamp. Illuminance is expressed in luminous flux (lux LX), and the unit is LM/㎡, that is, lumen/square meter.

In layman's terms, it is the amount of light per unit area that the human eye can see. Assuming that the object is evenly illuminated by light, then when the luminous flux obtained on 1 square meter is 1 lumen, its illumination is 1 lux.