Switching off street lights after midnight saved South Gloucestershire Council £55,000 in a year, new figures have revealed.
Since last year, lights have been turned off for a five-hour period overnight in Bradley Stoke, Thornbury and Frampton Cotterell.
Councillor James Hunt said turning off street lights overnight had not caused any problems.
"Part night lighting has so far not had any notable adverse impact on crime."
The authority, which operates 30,000 lights, said about 4,000 were being turned off.
"We have worked closely with residents, the police and town and parish councils to introduce the scheme," Mr Hunt added.