However it works like any light bulb in that it lights up when mains live hot voltage is applied to it.
Voltage detector light switch.
Voltage detector w led light.
The bulb will light when you find the right wire.
Live out to switch.
Another great use for the circuit tester is to determine whether a switch is working photo 2.
Product information technical details.
The tester will produce a voltage reading if the switch is good however sometimes you can get false voltage reading which i will explain below.
If you use dimmable cfl or led bulbs look for a compatible motion detector switch such as one of the models from lutron.
Why a tester may read voltage while the light switch is off.
Testing a light switch this is a question that comes up often and here is the answer.
The three red wires on the right are.
A motion sensor night light can be a smart addition to a child s room.
The product is highly durable.
A common uk practice is to use the light fitting as a junction box for wiring fromthe supply to and from the light switch and onward to the next light fitting.
The product is easy to use and easy to handle.
An automatic light switch may also be useful in the garage laundry room or attic.
If the switch is good the bulb should light up and turn off as well.
Live in from supply.
This video explains their many benefits.