Many light bulbs produced today include a number followed by the letter K on its packaging. What does this mean, and how does ...

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 ...

The variations are due to differences in LED technology and how manufacturers measure lumen output. Using significantly less energy than traditional bulbs is the main reason that LED light bulbs ...