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Sine wave seems better but eye wateringly expensive. https://www.sjscycles.co.uk/lighting/sinewave-cycles-beacon-hub-dynamo-headlight-black/
Symmetrical Beam Pattern
- Ideal choice for off-road riding
Superior Brightness at Low and Medium Speeds
- Dynamo power is optimized at low-to-medium speeds, reaching 200 lumens at just 5 MPH, 500 lumens at 8 MPH, 650 lumens at 10 MPH, 750 lumens at 13 MPH.
- Ideal choice for off-road riding
bjf
sbbohr
800 Lumen at 17mph.
Not sure how useful that is for riding off road in the dark.