i have an older Mobile Home and my husband was going to replace the light in the bathroom. Problem we have is that the wires coming out of the ceiling there are 2 of each Black and White, but the new light only has one of each, how do we wire it???? Hope some one can help. Thank you Lydia & Roger :

OK - am attemtpting to tap power off of an existing outlet to powere a new switch and light. The weird thing is that the wires from this box come from a separate breaker box on the exterior of the house (which also controls the heatpump). To make matter worse... the wires are not marked on the end that had been run into the outlet and there is no tape to identify them. I have four wires, three red and one black... on the breaker box end two of the three red wires are marked with tape (one green, one white) but I can't tell which ones these correspond to on the box end (some 20 ft away) by tugging. My questions: 1) Does the presence of 4 wires indicate that this might have been rigged as a 220? 2) Is there a way to identify which wire is which? 3) Should I just give up and call an electrician? lol Thanks!