Świetliki (The Fireflies) are a Polish band formed in Cracow in October 1992.They perform music described as a mix of alternative rock and sung poetry. Marcin Świetlicki is a lead vocalist and author of lyrics in most songs.Grzegorz Dyduch plays bass guitar.Since 2005 group often invites actor Bogusław Linda to participate in recordings and concerts as a guest vocalist. Until 2013 the group published 6 studio albums and gave 191 concerts.