I have three different lightswitches in my kitchen, and they control three different sets of lights in the room. I would like to control each set separately with a switch for each one, but also be able to control all three together with a single switch.
This seems like it shouldn't be too complicated, but I just asked the electrician doing work here and he said it would be very complicated and expensive. Is there a simple and elegant way to do this? Is there a specific kind of switch for this? How much would you expect it to cost to have this done?