Quote Originally Posted by Trainer_jyms
Quote Originally Posted by Irisheyes
Also my engineering spidey sense makes me think the idea is a load of balls.
The idea or the actual practice?
Just my initial thought would be that displaying darker colours on a computer screen wouldn't use less energy than displaying bright colours. FWIW I know nothing about how LCD/plasma screens work.

Also if it does make a difference I would guess that the difference is negligible.