Hey been searching for a definite answer on how to safely connect electric wiring on any of the aforementioned lamp systems. We have phase, neutral and ground here. I am wondering if phase and neutral cable on the lamp socket can be exchanged!? Does it matter in which direction electricity flows through the lamp? I know it's working both ways but would like to know are there problems or dangers doing it one or the other way. Electricians here? I took a voltage detector and used it on the cable coming from the ballast going to the lamp and its signalling power on the phase and the neutral cable. Why is that? I always thought the neutral cable should carry no power.