Lumens, watts, and lightbulbs: Know the facts before you buy ... Energy Star has a quick reference chart that roughly matches up old watt numbers with lumens. Projectors.

You would probably want to choose an LED bulb that uses 8 to 12 watts and has a lumen rating of 800 to get the same illumination. This conversion chart will help you find an LED bulb similar to ...

Home-centric weblog Apartment Therapy put this chart together to measure wattage equivalents in lumens, which are a measurement of light output (unlike watts, which is actually a unit of power).

As you can see in the chart above, an incandescent can draw up to five times as many watts for the same number of lumens. Get a sense of the brightness (in lumens) you need before heading to the ...

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 ...

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 ...

The U.S. Department of Energy is cranking up the minimum lightbulb efficiency level to 120 lumens per watt, up from the previous standard of 45 lumens per watt. The new standard, ...

Cree reports that the LED efficacy was measured at 231 lumens per watt using a single-die component at a correlated color temperature of 4500 K. Standard room temperature 350 mA testing was ...

An array of energy-efficient light bulbs throw off as much illumination as the old incandescents but burn as little as 6 watts of electricity, making lumens—not watts—the way to understand ...

The prototype operates at 200 lumens-per-watt, a number that is more than double what is found in typical household LED products. The "warm white" part might seem like a minor detail, but it's ...