To make Diwali a celebration of light rather than the sound, the Hyderabad City Police and AP Pollution Control Board have planned a joint campaign to bring down the level of noise and air pollution by cracking down on high decibel "bomb" crackers this year. The campaign will focus both sellers and buyers, especially the schoolchildren. About 30 wholesale dealers of the crackers in the twin cities were on Tuesday given the list of the powerful crackers, including the "hydrogen bomb", classic bomb and other crackers with a decibel level of over 125.