Hoping someone could answer this for me....I have a 14' enclosed trailer and I would love to install at least a 12" led light bar on the back. I already have a small light with switch and I am assuming it's just a 12 volt connection. Can I just remove the old incandescent light and install the LED light bar? Can I just tap into the existing wires and call it a day or do I need to install some transformer or regulator? Thanks to anyone that can answer this for me!