The light and sound show bring held dedicated to the 550th Prakash Purb of Sahib Sri Guru Nanak Dev Ji, today it's first day.The show which is being held at the Dana Mandi witnessed an unprecedented gathering of the people which thronged the venue in droves. The ultra modern technology coupled with lazer systems further added to the spiritual atmosphere.The people who came to see the show said that the philosophy of Sri Guru Nanak Dev Ji based on human values was aptly showcased through visual presentation and advanced lazer techniques by the creative sound track.In his address on the occasion, Sh TPS sandhu dc said that the Show emphasizes philosophy of Sahib Guru Nanak Dev Ji based on Universal Brotherhood, Social Equality and Saving Environment.