Now that we have light sources that can produce a small amount of light efficiently (LEDs) we don't really need that many lights built into the structure anyway

Now that we have light sources that can produce a small amount of light efficiently (LEDs) we don't really need that many lights built into the structure anyways. People can function in really really dim light. Just light up the whole building slightly all the time. You end up needing just the task lights and those are better controlled with switches at the place the light is used.