Let there be hands-free light
Sometimes, reaching a light switch can be difficult. One option is to install a motion-sensor light switch. My mother is in a wheelchair and with this type of switch, she simply has to roll into the room and the light turns on. You can set the length of time for the light to stay on - in the bathroom we set it to twenty minutes - and then it automatically shuts off. Motion sensor switches also have manual overrides.
One thing to keep in mind is the placement of the switch. The ideal is at the height the person is able to reach - not simply so that they can manually work the switch if need be, but also because you know the motion sensor will be triggered properly. For example, we didn’t move a switch from it’s normal height and my mother was low enough in her chair that it didn’t trigger the sensor. We ended up putting a small flag sticking up from the back of her chair, and that triggered the sensor 
