To save electricity on lighting, you should abide by the following principles:

1. Where long-time lighting is required, choose energy-saving lamps with high efficiency, such as electronic fluorescent lamps, PL lamps, and bulb-type fluorescent lamps, to prevent using power-hungry incandescent lamps.

2. Replace the fluorescent tube immediately after both ends of it turn black.

3. Choose milky-white or white for the ceilings and walls to increase the reflected light.

4. Select lamps that are easy to maintain. Good lamination relies on wiping every month.

5. Choose suitable brightness as needed by using lamps with a multi-phase switch.

6. Turn off lights when they are not in use.