Preparing for your older visitors by adjusting your home lighting is a great idea. As we grow older, our eyes change. Research shows that a 60-year-old needs twice as much light as a 30-year-old. With that in mind, it will help to set up special lighting for task areas before your older guests arrive.
It is important to have light that you can direct, such as a pivoting or adjustable head on a task lamp. If possible, have a few table lamps or a torchiere that can be turned on while they watch TV. That will help reduce the contrast between the bright screen and the surrounding darkness of the room.
Dimmers are ideal in the bathroom to add a bit of illumination to navigate during the night. That is helpful for people of any age.