> especialy if they don't use digitally coded descrimination. <

Ah, this is something I've wondered about. So, I gather there are such units? If so, any recommendations?

> Also HID lights tend to produce more EMI than halogens. <

Okay, I know what halogens are, but HID? I know what the initials stand for, but don't know if my LED light fits (but I doubt it).