DOT-Calcoast tests of "HID kits" installed in halogen headlamps (PDFs)

Test #1, with 9004 "HID kit" vs. 9004 bulb

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Test #2, with 9006 "HID kit" vs. 9006 bulb

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Test #3, with 9004 "HID kit" vs. 9004 bulb

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UK documentary showing results of installing "HID kit"
in E-code headlamps designed to produce a sharp cutoff on low beam