Working with my calculator, I came up with the following question. The answer surprised me. Knowing that lighter gauge wire results in greater energy loss (cost), I wondered what makes more sense to the consumer - paying more for heavier gauge wire (but less for energy) or paying less for lighter gauge wire (but more for energy). Let's consider a 250 ft. wire run of (12) 7W LED fixtures (1 every 20 ft.). Calculate the annual energy cost first with #14/2 then with #12/2. Then compare that with the difference in purchase price of the two wire types (about $64 difference - retail). How long before the homeowner breaks even on the additional expense of the heavier gauge wire. Any guesses?