Hello, I posted this in the home owners forum but didn't get much response. They recommended I post over here, so please don't kick this message back down there. I am hoping very much someone would be kind enough to guide me. Here is my situation, I am in a bit of a time crunch as I am coming up on my irrigation installation and I don't want to later retrench to put in wiring for lighting. I have not done tons of research on placement of lights, but I looked at a lot of houses in my neighborhood. Generally each tree has one spot light of some kind and then there are some driveway lights/lamps. I think this look is fine and would look lovely at my house once I put my trees in (next year). I realize there is more to this than meets the eye, but I figure for now I just need to get wiring to each tree and along the driveway, then I can study and figure out placement, brand, etc. I am making an assumption that I will go with LED. The reason for this assumption is that I have 11 lights on one line that runs about 350 feet, the other has about 4 that is shorter. If I go with higher wattage halogen lights I am guessing I will be over 300W. With LED I am pretty sure for 11 lights I would be easily under 150W. I could balance these but that means digging a mole under the driveway and that will cost me $375 (I know because I had to do this on the other side of my driveway (I have a circular) for my sprinkler and a wiring run) My main question is this. For a run that will be 350 feet or so, carrying 150W from a 15AMP socket, what gauge of wire should I use (12 or 10 or higher)? Any help on this would be extremely appreciated, I need to order some now so I have it in time for my sprinkler installation.