Sir, - Whilst red lights can and do mean different things to different people, and by reputation sailors in particular, can I nevertheless assure D. Baker (May 8th) - that in the case of Dun Laoghaire East Lighthouse, the change to a red light merely follows the normal marine conventions of red to port and green to starboard for port entrances. - Yours, etc.,
Marine Department, Irish Lights Office, Lower Pembroke Street, Dublin 2.