[KarlInOhio]

A 60 and a 40 add up to 100.

Not with light bulbs. A 100-watt bulb runs hotter and has more light in the visible spectrum. Although a 60 and a 40 will consume 100 watts of electricity, they will produce less light that a 100-watt bulb alone. That might be useful if you need light in two locations rather than one in the center of the room, or if you don't want the room to go dark when one bulb blows out, but even two 60-watt bulbs are barely brighter than a single 100-watt bulb.

GE Basic bulbs

watts	lumens	lumens/watt
40	505	12.63
60	865	14.42
75	1190	15.87
100	1710	17.1

[Elsie]

So, according to your chart; 100’s are MORE efficient than the smaller!

And THAT’s the one the Feds want to BAN???