Douglas Council says it's fitted more than half the town's lampposts with energy-efficient LED bulbs.
The local authority says it's now installed 2,500 of the units across the capital - in total it'll replace 4,400 lamps.
The £1.5 million investment is expected to save ratepayers around £2.7 million over 15 years.
The council says the lamps will also improve visibility for pedestrians and road users.
Bar George debts case heads to court
Do you know these men?
Garage warns of pothole which broke two wheels today
TT riders will miss special Bray Hill tree
Inflation steady at 3.3 per cent
Less than one percent of buildings on council blacklist
Senior Tynwald committee to look at healthcare funding
Government apologises after child benefit problems