I first wrote about the development of LED Fresnel lights two years ago, tracking earlier reactions by the industry to high energy consumption and high heat output: “Greening the Film Business: LED Fresnels.” This year I followed up with some of the same manufacturers.
Fresnel lenses, originally invented for lighthouses, have long been used on movie lights for careful light control and sharp shadows. Their typical concentric ring style enables them to have great diameter without clumsy thickness. . . . CONTINUE READING: NAB Roundup 2013: LED Fresnels, Camera Accessories
It’s a vicious cycle in the film business. We use scads of energy to light our sets, usually trying to make them look as natural as possible, then we use scads of energy to cool them. If we can reduce the power required for lighting, we can save money two ways. In the olden days of production, when I was starting out in the business, most movie lights (except for big arc lights) had tungsten or quartz lamps. These lamps employed a simple technology, like Edison’s light bulb, pushing so much electric current though a thin wire filament that it glowed and gave off light—and heat. Tungsten is still the most mature, least expensive, hottest, and least efficient lighting technology available. . . . CONTINUE READING: NAB 2011: Greening the Film Business—LED Fresnel Lights