As an important part of modern lighting, floodlights have a direct impact on the lighting effect. So, what is the irradiation range of floodlights? Let’s find out.
The irradiation range of a lamp that projects light can be roughly calculated by the following steps:
- Determine the luminous flux of the lamp: Luminous flux is the total amount of light emitted by the lamp, generally measured in lumens (lm). You can get this value by checking the product manual of the lamp or searching for the corresponding specifications.
- Determine the beam angle of the lamp: The beam angle of the lamp determines the range of light divergence, which is generally expressed in degrees (°). Generally speaking, the larger the beam angle, the wider the irradiation range.
- Calculate the light intensity at a specific distance: Use the following formula to calculate the light intensity at a specific distance (unit: lux):
Light intensity = luminous flux / (distance^2 * (4 * π) * tan(beam angle / 2)^2)
Here, the luminous flux is in lumens (lm), the distance is in meters (m), the light intensity is in lux, π is pi, and tan is the tangent function.
Through these steps, you can roughly calculate the light intensity within the floodlight range. Of course, the actual light intensity may also be affected by environmental factors, materials, and other factors, which may require more precise consideration in specific situations.