So you don't even know what speed you were doing? It's possible you were going faster than 30mph? You weren't paying attention to how long the lights had been green for?
Mate, any good prosecutor is going to have a field day with a comment like that. What was the speed limit anyway? If you have a loud exhaust on, then they will be able to say that they heard you accelerate aggresively, which instantly paints you as a boy racer. Even if there was a car between you, that doesn't mean that they couldn't see your car go past the lights as they were red.
My advice would strongly be to take this one on the chin and improve your driving. However, if you decide to contest it please keep us in the loop, and if you win I'll personally send you the confectionary item of your choice.