If you’ve ever looked into LED lighting, it’s almost certain you’ve crossed paths with the term “lumen.” Lumens, quite simply, are the standard unit of measurement used to describe how well a light ...

Testing spotlights and flashlights is tricky, especially now that all the best offerings are LED. Each LED emits an amount of light measured in lumens. You’d think 3,000 lumens would be brighter than ...

Light meters, these days, are no longer a mystery: From home-improvement stores to eBay and Amazon you can find have at least a few units available for purchase. An open-source light meter, however, ...