Around 2,100 devotees gathered on the banks of Sarayu River in Ayodhya on Saturday for the 'aarti' ceremony ahead of Deepotsav celebrations. Also, about 2.8 million lamps will light up 56 ghats, and a 32-foot-tall Pushpak Viman will be installed at Ram Ki Paidi. Last year, 25 lakh lamps were lit, with 1,121 people performing aarti together at Sarayu river.