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#11
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More stupid "tech" to produce light pollution
Chris L Peterson wrote:
On Thu, 6 Jul 2017 22:59:53 -0700 (PDT), "Chris.B" wrote: I could never understand the need for headlights on vehicles _AND_street lighting. I think they often serve different purposes. In urban areas, headlights are more about making cars visible to other drivers (thus daytime running lights, which are shown to reduce accidents). Of course, when used for that purpose headlights can be substantially dipped. Street lighting can be for cars, but is really only necessary at intersections and selected spots, not regularly spaced. Street lighting for pedestrians can be low and dim, possibly proximity activated in at least some situations. And certainly, all lighting should be designed to put the light where it's needed, and to hide the light source itself. You've been to the UK. You must have driven on country roads at night. When the road is relatively empty driving without streetlamps is easy. When it's busy the glare from the dipped headlights of oncoming traffic makes driving difficult. I drove home from Norwich this evening after a visit to a theatre. The first few miles though the well lit city roads (with good shielded LED lights) were easy. After the A47 roundabout at the edge of the city streetlights stop and the dark and slightly winding roads were difficult because of glare. It's just not possible to see the roads easily at bends when headlamps are shining in your eyes. I'm talking about dipped headlight here not full beam. It's made even worse by the one in forty or so drivers who think it's cool to have their front foglights on. This has a mandatory 60 pounds fine and three point on the licence if caught but prosecution is rare. |
#12
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More stupid "tech" to produce light pollution
On Fri, 7 Jul 2017 23:54:26 -0000 (UTC), Mike Collins
wrote: Chris L Peterson wrote: On Thu, 6 Jul 2017 22:59:53 -0700 (PDT), "Chris.B" wrote: I could never understand the need for headlights on vehicles _AND_street lighting. I think they often serve different purposes. In urban areas, headlights are more about making cars visible to other drivers (thus daytime running lights, which are shown to reduce accidents). Of course, when used for that purpose headlights can be substantially dipped. Street lighting can be for cars, but is really only necessary at intersections and selected spots, not regularly spaced. Street lighting for pedestrians can be low and dim, possibly proximity activated in at least some situations. And certainly, all lighting should be designed to put the light where it's needed, and to hide the light source itself. You've been to the UK. You must have driven on country roads at night. When the road is relatively empty driving without streetlamps is easy. When it's busy the glare from the dipped headlights of oncoming traffic makes driving difficult. I'd include that in my comment "selected spots". Of course, what it really comes down to is applying some good engineering. All too often I think that's skipped in favor of generic lighting formulas, which are seldom optimal for the situation. |
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