Someone with more experience than me with electrical theory please help with feedback: Based on the CAST formula for voltage drop... (24) LED's @ 4.5 watts, #14 WIRE, 100' run: voltage drop = 4.545 One run at tap #15 would cover this as a chain. So, my question, could I use this formula for a single wire run for a loop, by eliminating the x (2) for the cable? If so, I can make a 200' circular "loop" of a single #14 solid irrigation wire and get a similar voltage drop. If I power (12) (4.5 watt) LED's, I can go 400' with my loop and get the 4.545 voltage drop. All LED's would be in the acceptable range of voltage as specified by DG LIGHTS and Kichler, using tap #15. A simple method for wiring could be a (#12) or (#14) 2-wire landscape lighting cable run to a hub, where a splice for a loop begins using #14 solid. I could actually run one #14 solid wire in a large circle around my home, and drive 24 LED's. The wire is so easy to conceal, I can use my grinder to open up the expansion joint in my driveway, and just run across it. Or, I could just run two #14 loops, one for the front and one for the back. Talk about time, labor, and copper savings. Not to mention smaller transformer size. And just one transformer, controller, less conduit. No more stuffing terminals or making flying leads. Time saved in tweaking voltage taps. And the transformer can be a fixed 15 V. The solid wire makes such a quick and effective twist-on connection, one could just use the DBY's (the yellow twist-ons with small grease tubes) used by irrigation installers. Heck, with such singular, long runs, an automatic trencher may actually make sense. Service calls: one damaged wire or one failed LED, the whole circuit goes out. No problem, just use your wire tracer and fix the whole thing at your service call rate. Am I nuts?