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Old 07-14-21 | 08:51 AM
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rhm
multimodal commuter
 
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Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...

Originally Posted by Jskirbyman
Thanks everyone for your thoughts.
I’ve heard that it’s not always the lumens that are most important but the “beam pattern”, how the beam is not as bright at the bottom (where it’s closest) and it gets brighter as it gets to the top of the beam (and further away)… How have you found that works in practice? I don’t think the sine wave is built with that in mind, but I could be wrong!
It makes a big difference, both because there's light where you want it, and because there isn't light where you don't want it. The more light you make, the more your eyes adjust to it, so less light can mean you see more.

I use a B&M lumotech iq cyo premium senso-plus or something like that. 80 lux.
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