I recently purchased a high pressure sodium lamp for my garage. It has 2 wires white and black. I already know white is neutral and black is hot. I'm trying to connect it to an old computer psu cord. It has brown, blue and green wires and a shield. I connected black on the lamp to brown on the cord, and blue on the cord to white on the lamp. Doesnt have a ground wire on the lamp fixture. I just wanted to know if I wired it correctly. Thanks in advance.