Thursday, April 10, 2008

How to Choose lights for Video Production?

Professional photographers and videographers typically use several different lights of varying type and intensity. Multiple light sources provide more control over shadows and image detail, and different kinds of lights have different affects. Lights that you’ll use break down into three basic types:
  • Incandescent: These are your good old-fashioned light bulbs like the ones Thomas Edison invented. Most of the light bulbs around your house are probably incandescent. Incandescent lights are usually cheap, but the light temperature is lower than with other types of lighting (meaning they are not as bright) and they usually provide wavering, inconsistent performance.
  • Halogen: Okay, technically halogen lights are also incandescent, but they usually burn at a much higher temperature (and provide a more consistent light over their lifetimes) than do regular bulbs. Many professional video-lighting systems are tungsten-halogen lights, which means they have a tungsten filament passing through a sealed tube of halogen gas. Good, cheap halogen work lights also work well for video lighting — and they are generally available at tool and hardware stores. Halogen work lights also sometimes come with useful stands, though you can make your own stands using threaded plastic pipe and clamps from your friendly neighborhood hardware store.
  • Fluorescent: Fluorescents also tend to give off a high-temperature light, though the temperature can vary greatly depending on the condition and age of the bulb. Fluorescent light is usually both very white and soft, making it ideal for video lighting. Fluorescent fixtures and bulbs can be purchased for less than $20 and can be easily suspended above your subject.
If you use fluorescent bulbs, let them warm up for a few minutes before shooting your video. This should prevent flicker. If the bulbs still flicker after they’ve warmed for a bit, try using new or different bulbs. Also, pay attention to how fluorescent lights affect your audio recordings. Fluorescent bulbs tend to produce a hum in audio recordings, so some practice and testing may be necessary. If fluorescent humming in your audio recording is a problem, record audio separately or use a different kind of light.

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