Qualilux A15 Small Dusk to Dawn Light Bulbs Outdoor 450LM Warm White 5W=40W Auto On/Off Non-Dimmable Replacement LED Bulb for String Lights Porch Patio Garden E26 Base 4-Pack HQ-H032

QUALILUX Dusk to Dawn A15 LED Light Bulb is made with a built-in photocell sensor. It can be automatically turned on at dusk when light is fade away and off at dawn when light is detected.- Built-in Photocell sensor.- Automatically turn on at dusk and off at dawn.- No timer required.  QUALILUX unique technology of smart chip supports the bulbs to recognize its own light or natural light. They can be used at close without interfering to each other. - Built-in smart chip.- Can use at close to each other.- No interference problem.  - Support the close use of 2 or more bulbs. - No need to keep their distance more than 3.3 FT.  QUALILUX Dusk to Dawn Light Bulbs are very convenient to use. Just keep the switch on and forget it. No requirements for a timer.- Convenient to use. - Easy to install. - Keep the switch on.  Specification:Bulb Shape: A15Bulb Base: E26Bulb Size: 2x3.5 inchesInput Voltage: 120 Volts (AC)Power Use: 5 WattsPower Equivalent: 40 WattsLuminous Flux: 450 lmColor Temperature: Warm White 3000KLED Chips: SMD 2835Life time: 25000 hoursBeam Angle: 270 degrees Package content:4 bulbs Applications:porch light post light ceiling light wall lantern front door hallway garden patio stairways garage yard.