5,100 'diyas' were lit together and arranged in rows around the temple and at all sacred spots close to it, he said.
A similar programme will be held tomorrow too to mark the festival, he said.
It is for the first time in the history of the famous temple that Diwali is being celebrated on such a grand scale, he said.
Security around the temple and its vicinity has been tightened in view of the PM's visit.
Senior BJP leaders including party's Uttarakhand incharge Shyam Jaju, its state unit president Ajay Bhatt, Haridwar MP Ramesh Pokhriyal Nishank and Acharya Balkrishna of Patanjali Yogpeeth have arrived here ahead of the PM's visit.
The Prime Minister is likely to spend nearly two hours here on Diwali.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)