need advice on a lightbulb changer to change lightbulbs, flared types & twist& lock types

[tyrolblue]

13. lightbulb

As an electrician I highly doubt that all of those bulbs went bad at the same time. Most can lights are wired in a daisy chain as in they feed a hot wire to one can and then jump to the other cans. If a hot wire connection (should be black wire) becomes loose or burnt then all of the other lights will not light that are down the line. After securing a light bulb changer that works for you, install a bulb the farthest away from the working can. If it does not come on, then you need to inspect the wiring in the can that is fed from the working one. Should be the one closest to the working can. Usually in this event the black wires and wirenut are the problem, however the white wire connection (neutral wire)will do the same thing because the bad white connection will not allow a return path for the current.