The Grin Tech ebike lights are designed explicitly for use on electric bicycles. They will operate efficiently with anywhere from 15V to 100V on the input. Not only can they be directly connected to your battery pack, they'll continue to work fine even if you upgrade or change your battery voltage in the future. All lights are available with 5.5x2.1mm DC input jack so they can be powered directly from a Cycle Analyst (V2.3 or newer) but some custom wiring options are available as well.
US$70.00Grin Tech 1 Watt 12 LED Waterproof ElectroLight with Button and Handlebar Mount. 12-100V Input R...
US$60.00Grin Tech 8 LED Waterproof Rear Electrolight with Button and Unterminated Leads. 12-100V Input R...
US$60.00Grin Tech 8 LED Waterproof Rear Electrolight with Button and DC Power Jack. 12-100V Input Range
US$80.00New 400 Lumen Ebike Light, Handlebar On/Off Push Button, 6-85V Input Range, and StVZO Compliant Optics. Powers from Cycle Analyst