If you've been wondering what spending top dollar gets you, let us introduce Wilma. From a practical perspective the minimal lamp connects via a short cable to the stem-mounted battery. The switch is in a separate 'stalk' of cable that can be positioned close to the grips for easy use.
Once in place the small square button glows blue in the dark and also has a low power indicator. Hit the switch and your sight line is filled with a bright clean light that has a natural, even tone. It's as close to daylight as you'll get, so yes, spending the extra money could very well revolutionise your night riding. Which is just as well, because you won't be able to afford to do anything else this winter.