The purple Versatile looks great, Auntie H. And you already have the Flevo roof, which is a nice wet weather accessory.
The Versatile's power supply is 12 volts, so it might be worth looking at motor cycle after-market lights.
Although my Quest has all of the available lighting options from the factory: 12V supplying twin headlights, tail light, indicators, brake, and sort-of-fog (which is really just a brake override switch), and even though the single big LED of a tail light looks prosaic but is actually remarkably visible, I'm in the process of adding a high level rear light for better visibility when amongst traffic. I'm using the snappily-named
Universal LED Stop/Tail Light with Integrated Indicators from The Online Parts Shop. It's good, and very compact, but there are brighter lights out there.
The indicators and brake light will be run off the standard wiring loom, but the tail light will be switched separately. I'm just waiting for VDC to send me my 5-pole mini XLRs so that I can easily unplug the light in the summertime.
In terms of adding a brake light function, the Quest (and Mango, and Alleweder I suppose) use a regular long lever-button microswitch screwed to one side of the brake lever clamp—custom, I know, and not terribly similar to Helen's panzer steering setup. It's bent to shape and wired such that at rest the brake lever depresses the switch and breaks the circuit, and pulling the brake lever releases the switch and completes the circuit.