HC Deb 04 March 1985 vol 74 c381W
Mr. George Robertson

asked the Secretary of State for Northern Ireland what proportion of road lighting lanterns in use on urban roads are fluorescent; and what is their age.

Mr. Chris Patten

It is estimated that 12½ per cent. of the road lighting lanterns in use on urban roads in Northern Ireland are fluorescent. The average age of these fluorescent lanterns is approximately 15 years.