Very impressive LED line and I was incorrect on one of my statements. These low voltage units do take 12 volts AC, they have a built in driver. It keeps it compatible with the old standard incandescent low voltage systems.
These are FIRST CLASS commercial grade lighting solutions.
Our home had 2 strings/transformers of old 20 watt 12 volt Malibu Halogen landscape lights in the front. I reused the Malibu transformers and replaced several of the 20w/12v Malibu spots with 9w/12v LED G2 Spots from
http://www.landscapelightingworld.com/led-landscape-lighting-spotlight-g2-infiniti-p/val-1033-bz.htm The LEDs gave me capacity to double the number of spots using the same transformers. I therefor also added 9w/12v LEDs to light up the front 6 large Palm trees, 2 large Oak trees and a good size Magnolia Tree at night off the same Malibu transformer.
In my backyard I installed one of their 300w 12v-16v first class transformers to supply several 18W/12v G2 spots to light up palms in the backyard and additional 12v floods for the backyard. The transformers have multiple taps to compensate for voltage loss for long wire runs so light output is balanced. You can have some strings taping the 12v, another string taping 14, 15 and/or 15 volt output so that you get 12 volts at the light on long runs.
I installed Z-wave receptacles at each of the 3 outdoor transformer boxes. The Z-Wave deices are controlled by self installed Honeywell alarm system. I have scenes set so outdoor Lights are automatically turned on at sunset and remain on for 4 hours. Another scene set so when I open the front door anytime between sunset-sunrise the front lights come on. I also can manually command them via my iPhone or iPads remotely or locally .
I'm a tech junky. My wife says everything in the house is "rigged." Toto washlet toilet seat has an RF remote control, Garage Door has MyQ WIFI remote, multiple IP cameras, Alarm with cellular and interactive access, dozens of Z-Wave receptacles for indoor and outdoor lights, Motion lights in hallways, garage and bathrooms, Electric car (Nissan Leaf) with charging station in the garage, pool controls via wifi for pump and pool heater, 21 SEER inverter heat pump A/C with Honeywell Redlink controlling 3 zones, remote iPhone app for the 3 thermostats ETC, ETC ETC. .