For simple film work, two photofloods are adequate. One of these becomes the may or key light. The other takes the place of a reflector and is used to lighten areas of shadow. For normal lighting, the two lamps would be placed at right angles to the subject, and the camera would be placed somewhere within the right angle. Occasioanlly, more than two lights may be necessary for some special effect such as back or top lighting.
Quartz lamps are ideal for normal filming.
One lamp can give enough light to fill an average-size room. Because they are so powerful, these lights are seldom pointed straight at the subject, but are reflected off walls or ceilings. With a little experience it is possible to achieve many interesting effects using only one quartz lamp which has been hand-held. Special effects Most rules are made to be broken. Some of the most interesting lighting effects are obtained in this way.