Cyclists caught riding without lights before Christmas made an agreement with police to avoid prosecution.
Seven cyclists were stopped in the Spalding area, with six agreeing to a restorative resolution rather than pay a fine.
This involved buying and fitting lights to their cycles and going to the police station to prove the work had been done.
The other rider faces a visit from officers and being issued with a summons.
Sgt Stuart Hurst said cyclists should be warned the police will continue making checks in the coming weeks.