SLAs for colo sites?

A neutral colo site has to just provide two things really: A/C and power. What happens when a colo site loses power even though they have all the necessary bells and whistles - generators, UPSs, multiple electrical carrier feeds, etc. Can anyone point me at actual online SLAs for colo sites that not only state 100% uptime but also state what happens if they fail that promise? Thanks, Hank