Didn't expect much, and perhaps it's mostly the screen glare that is the reason for the options rather than battery saving. While 12% longer battery life is more than might have been expected for simply dimming the LED it's not long enough to give a noticeable benefit.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix







