Dusk to Dawn LED Bulb, light up your world! This dusk to dawn light bulb is ideal for illuminating corridors and courtyards, and must be lit when it begins to darken. Since the built-in sensor automatically turns the light bulb off and on, there is no need to physically turn on the light bulb. It is worth noting that our dusk to dawn bulbs are sensitive to optical density. If the light sensor is blocked by the luminaire and the surroundings are dark, the light bulb may illuminate even during the day. Application: Garden, porch, hallway, pavement, front door, garage, paddock, driveway, stairs, loft, pole lights, outdoor wall lights, etc. Improve housing safety: The twilight-dawn sensor LED bulb is especially useful for outdoor/indoor lights. If you leave home or spend the night while on vacation - they will automatically turn on/off to enhance home security. Built-in photoelectric sensor The dusk to dawn bulb has a built-in photoelectric sensor that can automatically measure sunlight. When the illuminance is less than 15 Lux, it can be opened at dusk; When the illuminance is greater than 40 Lux, it can be turned off at dawn. Easy to install dusk to dawn sensor bulb has a standard E26 base. Simply plug the bulb into the E26 socket to work safely and stably. Note: Please turn off the power before installing the lamp. Parallel installation parallel mounting, keep at least 1.5m/4.9ft between two bulbs in case in case of mutual effect LED Sensor Light Bulbs: 5 Watt dusk to dawn outdoor light bulb,450 lumen,soft white (2700k),CRI 80+,Non Dimmable sensing light bulb. Dusk to Dawn Sensor: The outdoor sensing light bulb with light sensor, automatically turn on at dusk and turn it off at dawn.This eliminates the need to physically turn the bulb off and on. Energy Saving Sensor Bulbs:The dusk to dawn light bulb equivalent to 40 Watt incandescent bulb,save electric charge,therefore, cuts your electricity costs. Easy to Use: The dusk to dawn LED bulbs fit into any E26 standard by socket,perfect for porch,patio,garage,driveway,hallways,yard. Improve home safety: LED sensor bulbs are particularly suitable for outdoor/indoor lighting. When you are on vacation or on a business trip, even if there is no one in the house, the light-sensing bulb will illuminate your house to prevent thieves and enhance house safety.