Question

How many light sources do you know
Pls list them

Answer 1

The sun is the primary source of light. Other artificial sources are light bulb, torch light and some others. Thats all i can think of.

Answer 2

1) Sun.
2) Artifical lamps
3) Torches, bulbs and other household equipments.
4) Street lights
5) Headlights of vehicles.

That's all I could guess. Hope that helped!