Monty built me an excellent set of bicycle lights.
All lights on, in daylight.
The top pair of headlights are the high beams; the visibility setting has the lower headlights and the amber lights on, and the rear light in blinky mode, or solid when you apply the brakes.
The battery is a 14.8V 4400mAh Lion, under 300g. It's in a small nylon camera bag, held on with velcro to the front edge of the rack. We had to cut out portions of the stiffener from the seams of the bag to allow a regular sewing machine to go through it.
It's tricky to show how it looks lit up; be assured that the rear
light is in fact pure red - the wash-out is a camera artifact.
The buttons and driver's view: the rainbow of lights is the battery
meter, while the last two are headlights, then high beams.
View from the front.
Each of the highbeams is a single 5W Luxeon Star LED; the lowbeams are 1W each. The housing is copper piping and serves as a heat sink.
Handlebar end detail.
The brake switch is a waterproof Cherry momentary switch.
The other half of the blink pattern is the six LEDs across the
middle. All twelve go on when the brakes are applied.
