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Extreme pencil beam .... 120-130

posted by  Ken C on  Thu Nov 24 13:10 CST 2011
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last visit: Fri Oct 24 11:39 CST 2014
[RELATED]

These are probably the most extreme pencil beams, which mean an intense illumination of a very narrow corridor -- good for driving on a (24-hour) auto race on a track at night, where you're going 100mph down a strait stretch.

Such a pencil beam is not useful on a public road, where you want to have a broader illumination to see what's on the side of the road, or ahead on a road with more curvature; and you can't (or shouldn't) use it if you're within a half mile or more of a car ahead (when does that ever happen on today's roads?).

The lamp on the left, with the vertical lines, is probably more practical -- the lines would indicate some fresnel effect that spreads the beam into a slightly more useful (and less intense, straight ahead) illumination pattern.





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