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naraburns  nihil supernum  1yr ago (text post)   3593 thread views

Small-Scale Question Sunday for January 8, 2023

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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Isn't their brightness regulated?

Yes. The regulations can be found at this link—CFR title 49 section 571.108.S10, in the FMVSS. For example, if you want to find the requirements applicable to replaceable bulbs in a two-lamp system with mechanical aiming, check out the LB2M section of table XIX-a.

  • In the range 10 ° up to 90 ° up and 90 ° left to 90 ° right, the intensity must be no more than 125 candelas.

  • At the point 4 ° up and 8 ° left, the intensity must be at least 64 cd.

  • At the point 2 ° up and 4 ° left, the intensity must be at least 135 cd.

  • In the range 1 ° up and 1.5 ° left to [90 °?] left, the intensity must be no more than 700 cd.

  • In the range 0.5 ° up and 1.5 to [90 °?] left, the intensity must be no more than 1000 cd.

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A motte is a stone keep on a raised earthwork common in early medieval fortifications. More pertinently, it's an element in a rhetorical move called a "Motte-and-Bailey", originally identified by philosopher Nicholas Shackel. It describes the tendency in discourse for people to move from a controversial but high value claim to a defensible but less exciting one upon any resistance to the former. He likens this to the medieval fortification, where a desirable land (the bailey) is abandoned when in danger for the more easily defended motte. In Shackel's words, "The Motte represents the defensible but undesired propositions to which one retreats when hard pressed."

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