The summary of Florida's child labor laws as provided on their Department of Business and Professional Regulation, Division of Professions, Child Labor Program website states:
Quote Quoting Florida Work Regulations - Minors aged 16 and 17
Hours Worked:

For minors 16 & 17, the allowable work hours are: 30 hours a week when school is in session; eight hours per day between 6:30 a.m. and 11:00 p.m. if school is scheduled the following day. There are no limitations on hours worked when school is not scheduled the following day or during holidays and summer vacation.

Breaks:

Minors are not permitted to work for more than four hours without a 30-minute, uninterrupted meal break. This applies throughout the year.