Measuring light brightness

Back when the old incandescent bulbs were the only type of light bulbs available, their light output was measured in watts. (It’s interesting that watts more accurately measures energy used than light produced).  With the proliferation of longer-lasting and more energy-efficient CFL and LED bulbs, using the term watts is becoming obsolete for measuring the brightness of light bulbs.

Lumens is the new measure of light bulb brightness.  To understand the relationship between lumens and watts, and to perhaps make your light bulb shopping a little easier, the following chart should be illuminating (pun intended):

150W……………2,600 lumens
100W……………1,600 lumens
75W……………..1,100 lumens
60W……………….800 lumens
40W……………….450 lumens

About the Author

Mark H. Witte is a strong proponent for energy efficiency and renewable energy, and believes individuals should have more control over how the energy for their homes is produced.