9w LED GLS Night Sensor Dusk to Dawn Light Bulb – BC or ES – Daylight or Warm White
The LED night sensor dusk to dawn light bulb has an in-built photocell. This automatically turns the bulb on at dusk and off again in the morning, therefore the light will not remain on during the daytime. It is constructed with an Ultrasonic Integration Shell (omni-directional). A sensor is located on both sides of the bulb for optimum performance. The LED has a high lumen output of 810 lm, equivalent to a 100W incandescent. It saves up to 90% of energy traditionally consumed. Environmentally Friendly – Generates less heat and low carbon emission. The light will not remain on in daytime – less wasted energy. The LED has a high lumen output of 810 lm, equivalent to a 100W incandescent, and saves up to 90% of energy traditionally consumed.
Environmentally Friendly – Generates less heat and low carbon emission
FOR USE IN OUTDOOR FITTINGS ONLY – Unsuitable for dimming circuits
1/. The light levels that operate the bulb are factory preset, and cannot be changed.
2/. There is a built in delay before darkness turns the bulb on. This is to prevent the bulb from turning off and on constantly .To test the bulbs in daylight it is necessary to totally cover the light with a dark cloth. Simply covering the sensor will not turn the bulb on.
“Dusk to Dawn” or “Photocell” Lighting
What is a “dusk to dawn” or “Photocell” light? A photocell is a light sensitive electronic switch. In simple terms it senses the brightness of light, and at Dusk when the light level reduces it switches the light on, and at Dawn when the light level increases again it switches the light off. Hence there is no need for a timer, and it means that no energy is wasted by lights being on in daylight.
There is normally a delay of several seconds built into the photocell. This is to stop then turning off and on in error. For example, a passing car headlight could turn them on if the photocell were to react instantly.