The headlights on your car might not be as good as you think, according to a new study.
The study from the Insurance Institute of Highway Safety is the first in which they studied headlights on 31 midsize cars.
All but one of the cars received ratings of "acceptable," "marginal" or "poor."
The Toyota Prius was the only car to get a "good" rating but only on cars that have a $7,000 upgrade to better headlights with "high beam assist."
Some of the worst-performing headlights were found on the most expensive luxury vehicles. For example, the BMW 3 series halogen lights had a "marginal" rating, and two Mercedes models received "poor" ratings.
Find all the ratings at the Insurance Institute for Highway Safety.