The light at Cashla Bay was first established on 1 March 1984. The present apparatus was installed on 18 July 2005 when daylight exhibition of the light was introduced.
The character of the light is Dir. Isophase White Red Green 5 Seconds
The nominal day range of the light is White 3 Nautical Miles, Red and Green 2 Nautical Miles.
The nominal night range of the light is White 8 Nautical Miles, Red and Green 6 Nautical Miles.
The sectors are: Green 005.0°-008.5°, White 008.5°-011.5°, Red 011.5°-015.0°.
The height of the light is 6 Metres Above Mean Spring High Water.
On 17 December 2007 a vertical red stripe was painted on the white tower to upgrade the daylight conspicuity of this aid to navigation.