As I see the chart, the rider has to ride at 25-30 km/h to even reach minimum required electrical output for the Saferide pedelec light. Doable for some, but not really practical that the light is very dim until such speeds are reached. You may be able to tweak it so the minimum is reached before that, but probably not so much it will be a practical solution.
Why even bother, there are several 80 Lux dynamo lights on the market right now that works even at low speeds.