Fireflies Festival is a season which comes just before monsoon when they glow. Fireflies use their signature glow to attract the opposite gender.
When thousands of fireflies glow, it is indeed a best view to see. Because of too much light in the city, we cannot find these fireflies around us but they are not that far from us. There are number of spots known for firefly sightings
You can look up Prabalmachi, Rajmachi, Kondane, Purushwadi and Bhandardara to check out these bio luminescent bugs in action.