Fellow Lighting Geeks, The new LED revolution finds LL installers reverting back to the daisy chain method of wiring. Since wattages are much lower, it does make sense (in some installations) to tap off along a single wire run instead of using multiple home runs to Spider Splice locations. I was curious about this so I made some calculations and was surprised to find that voltage loss is still an important consideration. This is especially evident when the higher-wattage LED fixtures are used, and when you need to combine incandescent fixtures and LED fixtures. In some situations, you need to move up to the 13, 14, or 15V taps. In other situations, the voltage loss between the first and last fixture exceeds the voltage range of the particluar LED. With this in mind, I created an Excel calculator that predicts voltage loss. (Eventually, I'll convert it into a web page.) I strongly encourage anyone who likes playing with calculators, to download this calculator (beta version), put it to the test, and post feedback in this thread. All who provide relevent feedback get a free CAST Lighting hat! Download the new CAST System Calculator - Daisy Chain Version. Thanks!