Watts and lumens — they both describe lightbulbs, but do you know what they actually mean? Did you know that wattage is no longer a reliable way to tell how bright a bulb is? Do you know what makes ...

For most of us, all of our lives we have associated watts with the brightness of a light source. After all, when we change a light bulb at home, we choose a 100 watt bulb if we want more light than we ...

Lumen is a measure of brightness in LEDs. I am gradually switching to LED bulbs at home. I believe that’s the way to go if you want to trim your electricity bill. These bulbs are super efficient in ...

Q I keep reading articles and hear people talk about lumens from a light bulb and watts from a light bulb. I’m told that if I buy a compact fluorescent lamp, that swirly light bulb, that I have to get ...

Alina Bradford has been writing how-tos, tech articles and more for almost two decades. She currently writes for CNET's Smart Home Section, MTVNews' tech section and for Live Science's reference ...

The Energy Independence and Security Act of 2007 requires most screw-in lightbulbs to use at least 27 percent less energy by 2014. CFLs, LEDs, and some halogen bulbs, a type of incandescent, meet that ...

LED maker Cree announced this week that it had achieved a new record in terms of lighting efficiency, harvesting 303 lumens per watt from a white high power LED at room temperature. This represents a ...