Devotees light earthen lamps on the occasion of 'Kartik Purnima' during the Maha Arti at Banganga, Walkeshwar in Mumbai. Karthika or Kartik is one of the most auspicious months in the lunar calendar which begins on the day after Diwali, the Festival of Lights and ends after 30 days. It is considered very sacred by the devotees of Lord Shiva and Lord Vishnu.