The $309 million, 15-year contract is the city’s first public-private partnership, which prompted a fierce lobbying battle ahead of Tuesday’s vote.

Proponents say the $309 million contract to upgrade D.C.’s streetlights will be a win-win, but critics say the proposed partnership with the private sector is riskier than advertised.

Private companies like Microsoft and LinkedIn Learning are partners in the project to address children’s mental health.