Free bicycle lights will be handed out at five service stations throughout San Francisco tonight. This is all a part of "Light Up the Night," a darkness awareness event, if you will, brought to you by SFMTA and the SF Bicycle Coalition. Since December is the darkest month of the year and bike commuters must deal with an earlier nightfall, volunteers will install front and back bicycle lights at Market Street at Duboce Avenue, Howard Street at 8th Street, Valencia Street at Cesar Chavez Street (St. Luke's Hospital), McAllister Street at Webster Street (Ella Hill Hutch Center), and Polk Street at California Street. Remember: it happens from 6 p.m. - 7 p.m. tonight.