Here in Tennessee, we can run red and clear lights, but they must be able to be scene a full 360 degrees. In addition, BOTH must be operational at the same time. You can't run just your lights.
Also, we have the "Vanessa K Free" Act which makes it mandatory that ALL emergency vehicles come to a full stop at red lights and stop signs. We have to be trained on the Vanessa K act each year and it is mandatory or you will loose your right to run emergency traffic.
Vanessa K Free was a teenager killed in Chattanooga when a police officer running only his lights, ran a red light and T-boned the car Vanessa was riding in. She was killed and others in the car were seriously injured. Although the state law allows volunteer firefighters and medical service personnel to run lights and sirens, the local Sheriff of the county can forbid it.
I agree with those who think each case should be considered on its own merits. We've had many who drive responsibly and a small few (2) over the last decade who were kicked off the department for driving irresponsibly. Each case should be decided by the Chief. POV lights and siren are legal in Texas as long as the vehicle is operated in a safe manner ("does not present increased risk to other motorists").