Needs updating. The power draw of a light fixture is a poor indicator of the actual light output.

"How much lighting is required in a room? To calculate, simply multiply
the square footage by 1.5. Therefore, a 12′ x 16′ living room would
require 288 watts of lighting (12 x 16 x 1.5 = 288)."

Taking the nominal output for bare bulbs

1. An average 60 watt A lamp will output ~ 800 lumens.
2. A led Cree bulb outputs ~ 800 lumens and consumes ~ 10 watts.
3. An average CFL replacement for a 60 watt A lamp consumes ~ 13 - 15 watts and has an output of ~ 800 lumens.
4. A 50 watt MR16 GU10 halogen bulb outputs ~ 430 lumens.
5. A 72 watt halogen A lamp outputs ~ 1500 lumens.

Then there is the impact of shading which will vary between fixture types.