Reproduction 194 blade type red LED bulb for the rear side marker light indicators on your 1969, 1972 or 1973 Mercury Cougar. These plug and play LED's are going to be much brighter and draw less power than your standard incandescent bulbs.
Sold as a pair.
1970 - 1971 Cougar Owners: Because the side markers are integrated into the sequential system in these years, you can not just swap out the stock bulbs for LED bulbs, you will need the side marker adapters to make your lights work properly when swapping the side marker bulbs for LEDs:
1970 Cougar Side Marker Adapter
1971 Cougar Side Marker Adapter