Located at the northeast tip of Davaar Island at the mouth of Campbeltown Loch, Davaar Lighthouse comprises a white tower 20m (65 feet) in height, giving the light an elevation of 37m (121 feet) above sea level. It was the work of David & Thomas Stevenson in 1854. Adjacent is a row of white-washed light keepers' cottages and the total cost of the construction between £3,000 and £4,000.
The light used a mercury vapour lamp in conjunction with catoptric mirrors driven by clockwork machinery, giving an intensity of 300,000 candela (or candlepower) and a range of 23 miles (37 km). There was also an electric fog siren.
The lighthouse was automated in 1983 and the keepers' cottages now provide self-catering accommodation.