Replacing light fittings with ones with a battery backup
To answer the OP question is generally no,  wiring changes are not needed for bulbs with battery back up.  There are pros and cons to battery backup bulbs, so do your homework. Some people don't understand how they work and how to test them so give them bad reviews.  You can't test them by turning off a breaker with no other loads on the same circuit turned on. 

The lamp determines the difference between a power outage and simply being turned off measuring the resistance between the neutral and hot.  If there is a low resistance between the hot and neutral, the power is off, the resistance measures thru other devices on the same circuit that are "on".  If there are no other devices turned on in the same circuit, the bulb could be fooled and not illuminate. If there is very high resistance (or infinite), it assumes the switch is off. One other thing to look out for on these "battery backup" lamps, is they generally do not operate at full luminosity. They light up, but somewhere around 30%-50%  or so of normal, to preserve battery life.