0700 is 7:00am, in which they were generating 2 units.
0800 is 8:00am, in which they were generating 4 units.
They give you the generation schedule every hour using a 24hr. clock. Each unit equals approximately 50 megawatts. For example: 0900 150, would be 9:00am, 3 units generating or 2100 50, would be 9:00pm one unit generating.
AND
As quoted by Terry Beeson @ Dec 22 2008, 03:08 PM
"You read it like you would a science fiction novel... Don't believe most of it..."