Deepavali is rightly called "Festival of Lights" as can be seen from the images here. It is celebrated for 5 days and on all nights the sky is lighted by bursting crackers.
The crackers light the sky with various designs and patterns.
These are some of the images on the night of Deepavali sky over Bangalore.
At this time in India the sky is brightly lighted.
It is usually celebrated some time between mid-October and mid-November. Each day in the 5 days celebrated for varied reasons like slaying of demon by the lord, worship of Goddess of wealth. But it mainly signifies victory of good over evil. 
As a preparation to the festival the shops sell lot of items like crackers, variety of sweets, colorful people lanterns, lamps of various shapes. 
Rangoli are drawn in front of each of the homes. It is decorations made from colored powder and flowers.
People celebrate the festival by offering prayers to Lord, distributing sweets, decorating their homes with Rangoli, bursting crackers.
