Here is more about it:
The well known Ganga Aarti in Rishikesh take place on the banks of the river at Parmarth Niketan ashram every evening . Hundreds of national and international devotees gather to witness this event, every day.
The Ganga Aarti at Parmarth Niketan is organized and performed by ashram residents, particularly the children who are studying there. The ceremony commences with the singing of devotional songs, prayers, and a fire offering. The lamps are lit and the aarti occurs as the final part of the ceremony. The children sing along with the spiritual head of the ashram, in sweet, haunting voices. How to Attend Everyone is welcome to attend the Ganga Aarti at Parmarth Niketan.
Here's a tip:
Do arrive early if you want to get a seat on the steps close to the action. It can be difficult to see otherwise. Shoes must be removed but you can securely store them for free at the entrance.
Parmarth Niketan, Swargashram, Rishikesh, Uttarakhand 249304