What is enough light? The question is difficult enough but when faced with having to calculate how much LED lighting you need to create a well-lit space, it can become a bit more complicated. Whether it’s architectural LED lighting for commercial applications or residential applications, here’s how to determine how many LED Lumens you’ll need to properly light your space. A measurement of light emitted by a source, whether it’s LED, Fluorescent, Halogen, or Incandescent. This is also known as “brightness” or “light output.” Your reference point: A standard 100-watt incandescent light bulb produces about 1,500 – 1,700 lumens. Not a measure of brightness; instead, it’s a measure of how much electricity (or energy) a bulb consumes to reach its claimed brightness. Each type of light source, LED, Fluorescent, Halogen, or Incandescent has a different lumen-per-watt ratio. Below we’re going to use lumens as a measurement to make sure we have enough light for a space. Since we’ve conflated watts and lumens, it’s easier to talk about bulbs in terms of watts. So if a 100-watt incandescent produces 1,500 lumens, and a 10-watt LED does the same, the 10-Watt LED may advertise “100-watt equiv...