The seller tested it on his roof and it did not give problems, I have checked the bathroom that is next to it and cuts the neutral, in the room also cuts the neutral I do not know if it has to do that
If you have no knowledge of electricity it is convenient that you call someone who knows what he does. If you have any knowledge I will tell you that you have to reverse the polarity of that lamp. PREVIOUSLY CUT THE ENERGY. In the mouth corresponding to that luminaire the neutral reverses with the phase, the center of the key has to arrive alive or phase and the return goes to the center of the lamp holder and the outer side of the same is connected to the neutral. REPITO IF YOU DON'T HAVE KNOWLEDGE CALL AN ELECTRICIAN. regards
Aya I understand the phase return to the middle of the focus and the neutral to the sides
Of course, the live one goes to the center of the key and its exit (return) to the center of the lampholder. That should work fine.