HOW THEY COMPARE
WATTS NEED TO PRODUCE 1,100 LUMENS
In this chart, notice the difference in wattage required to produce 1,100 lumens. Per watt used, LEDs produce many more lumens (or light) than either incandescent bulbs or CFLs (compact fluorescent bulbs). Buying Tip: What does all this mean for you? For one, you should be looking at LED bulbs or fixtures to see how many lumens they produce, not how many watts they use; the more lumens, the more light. As seen in the chart an LED using only 6 to 8 watts of energy outputs light comparable to a 40 watt incandescent or a 9 to 13 watt CFL.
Per Watt used, LED lighting produces far more lumens than incandescents and compact fluorescent lighting.
LEDs last a very long time, anywhere from 10-20 years on average under optimal conditions. This eliminates the need to constantly buy and change new bulbs, and reduces the load on landfills. Buying Tip: Replace hard to reach incandescent bulbs (like those on that hallway chandelier you have to use the step ladder to get at) with LEDs; they will last for years and will greatly decrease the number of times you need to replace the bulbs (and climb that ladder).
Energy Efficiency and LEDs
Of course, the first thing most of us think about is the fact that LEDs use far less energy than other light sources. Indeed, LEDs are the greenest option on the market today. In the past, people estimated the brightness of a bulb by its wattage. But LEDs use much less electricity so the old wattage measurement no longer applies. So now we use “lumens” instead to measure brightness.