According to the current LED lamp technology (light effect is 80-120 lumens/watt): the luminous flux of led12w ceiling lamp is about 800-1200 lumens, which is equivalent to 80-120 watt incandescent lamps, which is equivalent to 11-15 watts. Watt energy-saving lamps are generally used in home ceiling lamps, hall ceiling lamps, table lamps, and ceiling lamps.

1. The brightness of a 12-watt led ceiling lamp is about 1000 lumens, which is equivalent to a 60-watt incandescent lamp.

2. The brightness of a 12-watt led ceiling light is about 1000 lumens.

3. The brightness of LED lights depends on the lamp beads and power supply. There is also whether the lamp has a cover, the light efficiency of good lamp beads and power supply is above 100LM/w, and the medium is 90LM/w. You can take an average of 95lm1 watt. 40*95=3800lm.