I stopped at Ace Hardware this afternoon, and ran across a gadget I’d never heard of before; the LightKeeper Pro. This is the thing if you’ve ever fought with a string of miniature Christmas lights that wouldn’t work — it fixes them.
The LightKeeper Pro is designed to solve the frequent problems associated with Miniature Light Sets and Bulbs.
By simply plugging your light set into the LightKeeper Pro and pressing the Trigger, most problems can be fixed automatically.
Most miniature Holiday Light set failures occur when an individual bulb “shunt” fails to energize. These shunts are energized when a filament burns out. This causes a section of lights, usually 35 or 50, to go out instead of just one light bulb. This is because miniature light sets are wired in “series” and electricity must flow through each bulb, to the next, for them to light.The LightKeeper Pro Quick Fix Trigger sends a shaped, electrical pulse through the defective bulb, clearing the shunt. This allows it to operate properly. The current can then flow through the light set completing the circuit and illuminating the other bulbs.
I don’t pretend to understand how you can “shape” an electrical pulse, but if the demo video is to be believed, it seems to do the trick. Any EE’s out there want to take a stab at explaining the science behind this thing?
I threw out two strings of lights a few weeks ago because I couldn’t get them to work. But I’d have to go through several $3 light sets to justify the $20 they wanted for the LightKeeper Pro. Maybe I’ll just wait until after Christmas, when they are sure to go on clearance.