> The relative cost of lighting on the monthly electricity bill is tiny so those savings are pretty small. Getting a more efficient fridge, washing machine, TV or (in our profession) computer typically has a much bigger effect on electricity expenses. And that is assuming your heating and cooking is done with gas.

The switch from using tiny space heaters for light to using LEDs that consume a tenth of the power was a huge savings. It only takes a few 100w bulbs to equal or exceed the energy consumption of a modest desktop computer.