James,
It depends on what you want to run on DC. If your intent is a full blown dual sport type setup with battery then the stator mod and DC grounded frame may be the way to go. If you just want to add better lighting like LED or HID then an isolated DC system just for the lights is cleaner.
The 10W LED lights use an internal driver and require 9 to 30 VDC, HID similar but higher power requirements. Two of these lights on my Ducati Hypermotard make the 55W halogen headlight irrelavant. They are also small and totally bulletproof, perfect for rugged offroad use. Being only 20w total (3.4A @ 12V) its easy to get a lot of light out of the stock stator. I will be trying this myself, to run a pair of VisionX LED driving lights on an isolated DC system from a 2K-2 ignition. Lights, rectifier/regulator, capacitor, switch and connector, no battery needed. Everything will be mounted to the back of a number plate.
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