Power saving questions

Hello

I was just adjusting LCD backlight off to 10 sec and brightness to minimum to conserve battery.
Is it possible to switch scroll wheel light totally off since it has no other function than being “cool”? It has 4 leds after all.

Also
Which consumes more power: to play MP3:s or to listen FM radio?

I would like to see a setting to be able to disable the scroll wheel light. Imo the radio probably consumes power at a much lower rate than playing mp3 files. I have not done any tests of this though. My guess is that battery consumption for the radio might be around half that for playing mp3 files.