Herrmans H-flow

Tested: From 2015-2-19

Specifications:

Herrmans H-Flow

Mass: ca. 42 g for the lamphead with cable, 66g including stainless steel mounting bracket/bolt/nut, and 75 g with the front retro-reflector.
Size: width: ca. 49 mm, height: ca. 53 mm (without protruding piece for the mounting bracket), length ca. 48 mm.
LED:
Mounting width: 12mm (this is not standard), or ca. 22mm with the plastic insert for the mount for a Suntour fork.
On/off: Automatic, but there are versions for standard dynamos (always on).
Standlight: Not on the one I tested, but there is a version with standlight.
Price: ca. € 34,-, version with standlight ca. €40,-, version for sidewall dynamo (always on) ca. €28,-

Pictures:

Herrmans H-Flow, front view Herrmans H-Flow, side view

Experiences:

Beamshots:

For background information on making beamshots see: Camera settings, lamp settings and roads used to make the beamshots.

Beamshots are yet to be made...

Road 2, camera height 1.65m, camera distance: -0.40m, camera aim: 50m on the road.

Herrmans H-Diver
Lamp height 0.75m
lamp on at 0.75m height
Camera: h=1.65, d=-0.40, aim=50m
(Original 14 megapixel)
Lamp height 1.05m
lamp on at 0.75m height
Camera: h=1.65, d=-0.40, aim=50m
(Original 14 megapixel)

The pattern in the light beam near the front wheel:
lamp on at 0.75m height
(Original 14 megapixel)

Preliminary conclusion:

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