Reproduction 4002 incandescent (non-halogen) low beam light bulb for the 1967, 1968, 1969, 1970, 1971, 1972 and 1973 Mercury Cougar. Plugs right in to the factory 3-prong plug and mounts in the outboard position on the car.
These are close to OEM wattage (37.5 / 60 watt, OEM was 37.5 / 50 watt) to work with the factory headlight switch, without adding any relays like you would for higher wattage halogen bulbs.
Ford Bulb #: 4002, Aftermarket Bulb #: 4000. Sold individually, 2 required per car.