Kabir, do a search and read through some previous threads. You will need lots and lots of lights for films. You can never have too many IMO. That said, one or two lights can work for certain situations. My advice is to buy only quality lights as your budget allows (even if that only means one light to start) rather than buy several cheap lights which will cause you headaches along the way. Arris, Mole-Richardson, and Lowels (only certain lights and/or certain applications for the Lowels).