Deputy streets commissioner Rich Montanez says it also won't be cheap with the city's 100,000 streetlights.
"Probably $50 million, maybe more," he said.
He says each light costs between $250 and $600. Larger lights are needed on major routes like Roosevelt Boulevard. But the payoff is that each one will be about 40 percent more efficient than the current bulbs.
Montanez says they are carefully considering lighting options to make sure they get it right the first time.
"Color temperature being one. The light distribution being another. Glare...we want to make sure there is not too much glare on the driver," he said.
He says once they select a contractor, it could take about two years to complete even though each light only takes about 20 minutes to replace.