Under the glaring light of a fluorescent bulb, men in dark clothing and hats approach fare card machines; one older man in a blue scarf glances up as he puts on his gloves.
The men are wearing bright suits in the park.
It doesn't make sense to be wearing dark clothing and bright suits at the same time and the light bulb implies the would be inside, not outside at the park.
Dark and bright are opposing contrasts of light.   Hats and suits are different articles of clothing. One man is singular to men-which is plural.
Men cannot wear dark clothing and bright suits at the same time.