Backflow incense might take 30-40 seconds to start, After it creates an illusion of a smokey waterfall the waterfall and with the cone's special properties, the smoke starts to flow in reverse direction, that is from top to bottom and in-turn creates a beautiful smokey waterfall; festive occasions - like diwali , raksha bandhan , grah pravesh and corporate gifts Can be used in Living room, bedroom, study, office, meditation room, yoga room, hotel, library,etc.