There’s a heated debate about energy efficiency in lighting. The question at the heart of it is whether LEDs or modern fluorescents offer the best light for the least lifetime cost.
You might notice that high-intensity discharge (HID) lamps, such as metal halide and high-pressure sodium lamps, are rarely part of the discussion. Now look up. Are your facility’s fixtures round? If so, chances are you’re spending a lot more money, and burning a lot more energy, than you need to.