"It may even fit in the headlight bucket."
That would be ideal!
I'm not sure about lumens. I mostly ride in the city.
Thanks for your imput bro's (and sista's).
For reference, the tiny, USB rechargeable, Lithium powered headlight that I bought last year claims 700 lumens. It has decent output, and high / low / and flash modes. The rechargeable battery is rated at 1200 mAh.
I think think this is sufficient light for me to feel seen, but I imagine from the driver's perspective, it's a very small spot of light. Bigger might be better. I think that car driver's brains tend to see everything as another car. I avoid twin lights on motorcycles for this reason, because I think drivers tend to see them as two car headlights, at a greater distance. A small single light probably registers on the brain as a car very far away, far enough away that the headlights merge. Far enough away that there is no reason not to make a left turn in front of whatever that is.
The matching Taillight claims 245 lumens and 180mAh. It's got multiple modes with different blink patterns for the multiple LEDs.
That's another way to get more light output, ... multiple LEDs, even as discrete bulbs. This is how some relatively high output bicycle lights are built nowadays. For example, this assembly has 12 LEDs and an integrated, rechargeable Lithium battery:
With these little, self contained lights costing under $6 for the set of white / red, it might be a viable idea to use the entire assembly as a replaceable insert into your larger housing, if it is bright enough, and can be placed near the focal point of the reflector.
One could magnet or velcro mount, and pull the entire assembly out to recharge and swap with a fully charged assembly. Less wires, less electrical components means less hassle, better reliability. It would be a shame to ruin an expensive 48V lithium pack because my cheap DC / DC converter failed as a dead short, or the insulation on my amateur wiring job chafed.
