Some of the students at Parsippany Hills High School who usually buy hot lunches are brown-bagging it instead.

Chidorian, Flickr

Friday's protest is aimed in part at smaller portions mandated this fall under new federal standards. They are also upset with the rise in prices.

Leaner and greener lunches are on the menu this year as a result of the biggest update to federal school-food guidelines in 15 years. The rules also cap lunches at an average 850 calories a day.

One of the student organizers, senior Brandon Faris, says he found support from students, teachers and administrators alike. But co-organizer Nicholas Caccavale, a junior, says some students were reluctant to take part Friday because a Chinese food buffet was on the menu.

Copyright 2012 The Associated Press.