Lighting used to be straightforward. Bulb type, fixtures, lighting levels, and controls had been chosen (with or without you) during design and construction of the building. As an occupant, you got to tag along and buy replacement bulbs with almost no ability to change or adapt to new needs and technologies.
Advanced lighting has brought us not only energy savings, but also a slew of new screw-in-a-light bulb jokes. For LEDs, it usually goes something like this: How many people does it take to screw in a LED light? One. And a roomful of deep wallets to pay for it.