284 Video Production Handbook some brands of this light have uneven beams. However, this light has many advantages. it is extremely portable, compact, and efficient, all of which are useful when ventilation and power are limited. diffuser or corrective color gels are easily clipped to its barn doors. 11.27 FRESNEL SPOTLIGHTS in television studios, where the lights have to be positioned a fair distance from the subjects, the large heavy-duty fresnel spotlight is universal, sus- pended from ceiling bars or battens (figure 11.27). it is lighter than the other studio spotlight (the ellipsoidal), sometimes has an adjustable beam, and provides an unfocused spotlight beam. the fresnel is probably used more in studios than any other light. FIGURE 11.26 This open face adjustable light unit can be used as a spot or floodlight. (Photo courtesy of Mole-Richardson.) FIGURE 11.27 The Fresnel light is a nondefined spotlight. It is lightweight, less expensive than an ellipsoidal, and has an adjustable beam. (Photo courtesy of Mole-Richardson.) PRACTICAL LIGHTING 11.28 THE GENERAL APPROACH TO LIGHTING As discussed earlier, if a light is moved from near the camera's position over to the right, any prominent feature on the subject's surface, such as someone's nose, will cast a shadow to the left. As the lighting angle increases, such shad- ows spread across the surface, emphasizing its shape and texture. the greater the light's angle, the greater the effect. At the same time, the shadow of the