That is my first try also in the icons so I'am not hoping so much, I have made an Orange ver. of this [link]
if you like to chek them out.
they are bunsh of Power Buttons (Turn Off-Stand By-Restart-Log off-Hibernate). (BLACK VERSION>Log Off Key changed)
I made 5 Png's 256x256 Px. ,5 Icons 16x16 Px.
I hope you enjoy em