Errm, there are NO camera on traffic lights, the only time you get penalised for jumping red lights are when there are cameras specfically for the task, which are very rare.
The little things ontop of traffic lights are sensors, not cameras. Therefore, you can jump red lights all you want - you won't get caught, unless there is one of those cameras which look like ordinary speed cameras facing the lights, or a police car is behind you. The thing you do risk having is an accident, obviously.
As for temporary lights, theres no cameras attached and although you're supposed to obey them who really cares, theres some where I live due to roadworks at the moment and if its clear on the other side I just go straight through them.