Involved in the synthesis of phylloquinone (vitamin K1). Catalyzes the transfer of a prenyl chain to 2-carboxy-1,4-naphthoquinone. 1,4-dioxo-2-naphthoate + H(+) + phytyl diphosphate = CO2 + demethylphylloquinone + diphosphate Cofactor biosynthesis; phylloquinone biosynthesis. Mutants grow photoautotrophically under low light conditions, with doubling times twice that of the wild type, but they are unable to grow under high light conditions. Mutants contain less photosystem I (PSI) than the wild-type cells, and membranes do not contain detectable levels of phylloquinone. Belongs to the MenA family. Type 2 subfamily.