Who needs snow to have a fun Christmas?   The Treasure Coast area cleans up nicely for the holiday with festive light displays and exhibits for a Treasure Coast in Lights.   From neighborhood lights that challenge the best shows in the state to city-sponsored light festivals, the area has something to help everyone enjoy the holiday season.     PSL in Lights   As locals decorate for the holidays, the annual citywide challenge to find the best Christmas light displays is on!   Neighborhoods across the city will put forth their best step in creating amazing Christmas light displays, from choreographed displays to animatronics, PSL in Lights will shine…