The circular shaped installation, named the "Sun of Change", was set upon a large bamboo structure around 60 feet above the ground.
BJP Assam unit president Ranjeet Kumar Dass inaugurated the installation just before the evening Arghya of Chhath Puja.
A local organisation with financial backing from sponsors installed the 'sun' which would be there for two days.
Kamrup (Metro) Deputy Commissioner Dr M Angamuthu said it promises a better future for the people of Guwahati.