White light which is emitted to the rear of a vehicle from the lens of any lamp other than a backup lamp shall not exceed 7.75 mcd/cm2 (50 mcd/in.2) measured as described in Section 644.
Cal. Code Regs. Tit. 13, § 645
Note: Authority cited: Section 26103, Vehicle Code. Reference: Sections 24012 and 26103, Vehicle Code.