Radar light detection: Automatically turn on/off under the range of 6-8meters, low working voltage, secure and reliable, low power consumption, good color saturation. Installation: Safe power interface, easy to install and dismantle. Please turn off the power when you install the bulbs, the light and radar sensor bulb will auto light up and off in 30s when you turn switch on the first time. Widely application: The light and radar senor bulb is suitable for bedroom, household corridor, hallway, stair, step, toilets, office, coffee house, shopping center, exhibition hall, hospital etc Save electricity bill:The sensor led light bulb will save more than 90% on electricity bill of lighting. Eco-friendly: No lead or mercury. No UV or IR radiation. Healthy for eyes.