California high beams headlights are required to illuminate objects to a distance of how many feet?

It doesn't really matter that CA vehicle code section 24407 states "There shall be an uppermost distribution of light, or composite beam, so aimed and of such intensity as to reveal persons and vehicles at a distance of at least 350 feet ahead for all conditions of loading", because:

• Federal Motor Vehicle Safety Standard 108, which governs the design and construction and performance of headlamps on all vehicles in the United States preempts state codes,

• All FMVSS 108-compliant headlamps, aimed correctly, provide at least 350 feet of seeing distance, and

• Homemade or home-modified headlamps are illegal both Federally and per CA vehicle code section 26101, so if you were thinking of trying your hand at making some headlamps, that puts the kibosh on that idea.

Section 24407 was written into law in 1963, before there were Federal standards.