For the 2018 Honda Ridgeline, the high-beam headlight uses a 9005 bulb. Low-beam fitment depends on the headlight equipment: models with halogen headlights use H11 bulbs, while models with LED headlights use LED low beams. The data also lists 9005 for daytime running lights with halogen headlights and LED daytime running lights with LED headlights.
The fog light is listed as H8 LED. Front turn signals and parking lights use 7444NA, while rear turn signals and reverse lights use 7440. The brake lights, tail lights, and front and rear side markers are LED applications.
License-plate lighting has several listed options—168, 194, and 917—so compare the original bulb before ordering. Interior fitment also varies by location: map and reading lights are listed as 194, 2825, or 98; the vanity light uses 6615F; and the auto, floor, and glove-box locations include 2721 and/or 74 options.