Photometry.

S7.10.13 Photometry. Each DRL must have a luminous intensity not less than 500 cd at test point H-V, nor more than 3,000 cd at any location in the beam when tested according to the procedure of S14.2.4 as specified by this section, unless it is:
(a) A lower beam headlamp intended to operate as a DRL at full voltage, or a voltage lower than used to operate it as a lower beam headlamp, or
(b) An upper beam headlamp intended to operate as a DRL, whose luminous intensity at test point H-V is not more than 7,000 cd, and whose mounting height is not higher than 864 mm.

Source

49 CFR § 571.108


Scoping language

None
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