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What is the LED light?

Shop for Cordless Screw Drivers

Cordless screwdriver with LED light Some power tools have a small built-in or detachable LED light so that if you are working in a poorly-lit space, you can see what you’re doing. Here is an example of an LED light being used in a cordless screwdriver.
5mm LED light bulb LED stands for Light Emitting Diode and  is simply a small white or coloured light source.

LED lights come in many different shapes and sizes, but 5mm is usually the size that would be used on a power tool such as a cordless screwdriver.

Cordless screwdriver Because they are small and compact,  LED lightbulbs are perfect for use on power tools such as cordless screwdrivers.

Where is the LED light located?

LED light on bottom of chuck Some LED lights are located underneath the chuck.
Cordless screwdriver with LED light on top Some are located on top of the chuck.