Here is a review of another headlamp - HD16, by @Weerapat_K. The reason I quote it here, apart from the HS21 also being shown in this video, is that HD16 has a side rotating dial. The dial is used for mixing Spot and Flood intensity (except for red, where it works as I believe it should). The reviewer likes the idea of the side dial, but, as he mentions it several times in the video, would like it to adjust the light intensity instead. Just like I proposed for the HS21 (except I think indexed dial instead of a stepless one would work better as this would have a smaller, more ergonomic turning angle as opposed to turning it round and round) - couldn’t agree more.
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