LED lamp beads lighting lit light calculation method

I have seen a lot of LED lighting masters. They pay great attention to LED lamp bead lighting calculations. In their LED lamp bead lighting schemes Simulation calculation. Moreover, the more complicated the space, the more you need to perform lighting calculations. As a quantitative design method, the illumination calculation is indispensable on most occasions. If there are some errors, it is not difficult to find the necessary illuminance by calculating the LED lamp bead lighting design. Today we will introduce two methods.

2, LED one -by -point calculation of the calculation of the calculation of the computing algorithm is used when calculating the actual degree required for local lighting and the key display part. When the LED lamp beads are calculated for the calculation of the light flux method of LED lamp beads, 1 When installing a 100W nude bulb of 500lm, it is assumed that 30 % of the light beam should be directly illuminated on the ground. So how much is the direct illumination on the ground? E \u003d f / a \u003d 1500 * 0.3 / 10 \u003d 45LX Except for the beams that are irradiated on the ground, other beams illuminate the ceiling and wall surface. If the reflectance of the ceiling and the wall is high, the reflected light will be added to the direct illumination of the ground, so the actual illumination is above 45LX. Most of the lamps for basic LED lighting are direct light -equipped downlight lighting and mixed lighting lamps with fluorescent lamps, as well as indirect lighting of ceiling light such as light glow grooves. The illumination calculation of direct light matching, the more the light is affected by the ceiling and wall reflectance. Even if the reflectance of the room is somewhat different, the average illumination error will be very small. However, if there are high partition walls and furniture, the calculation results of the shadow part of the shadow are deviated. In addition, the indirect LED lighting of the ceiling must not only be affected by the ceiling surface, but also greatly affected the wall reflectance rate. The distance from the ceiling is different, and the lighting utilization rate will change, so it is difficult to calculate without error.

舉例2

一棟正面開間8m，進深10m，室內凈高2．4m的房間，為了使室內的照明均勻，把20盞筒燈照明A燈具進行了整齊的排列配置，計算出此時The average illumination on the ground? (The reflectance of the room is the ceiling: 70 %, the wall: 50 %, the ground: 20 %)

Since the local lighting of hanging decoration and lighting lights is used, when calculating the direct horizontal plane strength or vertical surface illumination of a specific point, the illumination algorithm can be used.