But efficacy varies wildly from manufacturer to manufacturer, so itвЂ™s best to check the Lighting Facts label and try to match lumens. Use this 5:1 or 6:1 ratio as a rough guide when selecting an LED bulb to replace an incandescent bulb.ДЇor example, if you need to replace a 60-watt incandescent bulb with an LED bulb, then divide 60 watts by 5 to get 12 watts вЂ“ that will be a good estimate. So, LEDs are about 5-6 times more efficient at producing light than incandescent bulbs. LED technology typically produces 70-100 lumens/watt. The old technology of tungsten incandescent bulbs only had an efficacy of about 15 lumens/watt. This is a measure of how well a light source converts energy (watts) into light (lumens). Now that we understand watts and lumens, we can use both terms to come up with lumens per watt or вЂњefficacy.вЂќ Sometimes the term вЂњluminous efficacyвЂќ is used. Step 3: Understand Efficacy (Lumens/Watt)

It may take a while to get used to using lumens instead of watts, but itвЂ™s important in order to make the best lighting choices. We see these lumen numbers on the Lighting Facts labels found on all new LED bulb packages. All lighting manufacturers are starting to tell us how many lumens are produced by each of their lighting products.

The higher the lumens, the brighter the light. Step 2: Understand LumensДЄ lumen is a measure of visible light energy. But we canвЂ™t do that anymore, since LED technology produces more light while using fewer watts. Since we used 60-watt incandescent bulbs for so many years, we associated a certain level of brightness with 60 watts. A 60-watt bulb consumes 60 watts of energy. When we pay our electric bill, we pay for the number of watts we use. Watts are a measure of energy consumption.

Ge led edison 5 watt 440 lumens