1. The number next to the lighting switch symbol indicates the number of switches on the same switch panel. Such as 2; Represents a two-position switch. 3; Represents a three-position switch, etc. 1 switch is not marked.

2. The number next to the lamp generally indicates the power of the lamp, and the unit is "Watt". Some also indicate the installation height. For example, the symbol 3X20/3 next to the fluorescent lamp on the paper indicates that there are three fluorescent lamps installed there, each with a power of 20 watts and a height of 3 meters.