1. A good panel lamp needs reasonable lighting design. In order to avoid reflection glare and direct glare, the installation position and angle of blackboard lamp need professional lighting design.

2. Uniformity of illumination on the blackboard: Since the blackboard is a key area for displaying knowledge, the more uniform the light distribution, the more comfortable the visual sense will be, and the uniformity of illumination should be ≥ 0.8;

3. Blackboard lighting: the blackboard is the focus of students' attention, and classroom lighting needs high vertical illumination, which must meet the national standard value ≥ 500 LX;

4. Glare: Reflective glare and direct glare are common problems in blackboard lighting. In order to eliminate the influence of glare in blackboard lighting, the following three conditions need to be met. The reflected light of blackboard illumination does not enter the students' eyes through the blackboard surface; The light source of blackboard illumination does not directly enter the students' eyes; Teachers should not think that the blackboard lights are dazzling.