The Light Keeper Pro has the ability to fix the most common causes of light set failure, internal bulb failure, by simply plugging the light set into the tester and clicking 6-7 times. This internal bulb failure is a result of the shut failing to energize as the filament burns out.
The Light Keeper Pro also has the ability to do much more, including test down a set for voltage to detect the problem bulb. Below is a list of the Light Keeper Pro's features.
-Quick Fix Trigger
-Audio Voltage Detector
-Bulb & Fuse Tester
-Light Set Socket Connector
-AC Plug Connector
-Bulb Puller
-LED Headlight
-Storage Organizer in Handle For Extra Bulbs
-Batteries Included