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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: sms <scharf.steven@geemail.com> Newsgroups: rec.bicycles.tech Subject: Re: bike light optics Date: Fri, 29 Mar 2024 15:35:30 -0700 Organization: A noiseless patient Spider Lines: 31 Message-ID: <uu7fnk$i1ei$1@dont-email.me> References: <uu4104$3l4kb$1@dont-email.me> <UfGNN.144098$ET2.44725@fx12.ams4> Reply-To: scharf.steven@geemail.com MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Fri, 29 Mar 2024 22:35:32 +0100 (CET) Injection-Info: dont-email.me; posting-host="80d1aaae8cee03bb0e71dc4f9f1b21f1"; logging-data="591314"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+WyeKT4yiNQGPlhpYLzD4m" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:vD2RFmUi49qO9B2K+v4OEy6Pabc= Content-Language: en-US In-Reply-To: <UfGNN.144098$ET2.44725@fx12.ams4> Bytes: 2406 On 3/29/2024 2:19 PM, Roger Merriman wrote: <snip> > Unless it’s fairly tame riding that light would feel fairly poor on a > gravel bike, even with a road bike a cut off beam shape isn’t wildly great > if you’re relying on the light to see, off road be totally the wrong shape. It's the same issue on unlit MUPs which are quite common in my area because they are usually along creeks and rivers and the water district usually doesn't allow lighting. You _really_ want a beam that illuminates to the sides and a little upward. Many of these paths have no fence or railing to prevent a cyclist that can't see the sides from veering off the embankment. For roads, there are often trees with low-hanging branches that will whack you in the head (except where Frank lives because he claimed that delivery trucks driving close to the curb, or on the shoulder, will knock down any low-hanging branches). It must be miserable living in a place where the streets are only swept twice a year and where you have to depend on UPS, FedEx, etc., to clear low-hanging branches. -- “If you are not an expert on a subject, then your opinions about it really do matter less than the opinions of experts. It's not indoctrination nor elitism. It's just that you don't know as much as they do about the subject.”—Tin Foil Awards