Well, the power is really supplied by Centerpoint Energy. We get to choose our "Electric Provider" which really means who bills us.
Check out
Power to Choose to see how many we can use. Use zipcode 77001 for Houston.
The plans vary month to month, 3-4 month lock, 6 month lock, 12 month lock, 18 month lock and 24 month lock. Usually the longer the lock, the higher the rate.