O'Reilly logo

Location Lighting for Television by Alan Bermingham

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

8

Light Sources

8.1   Choice of Light Source

The decision on choice of light source is mainly influenced by:

  • efficacy or lumens/watt
  • lumens package
  • colour temperature
  • colour rendition index, Ra.

Other considerations are:

  • ability to dim the source electronically (or mechanically)
  • lack of auxiliary equipment
  • stability of light source colour – with dimming and with lamp life
  • lamp life
  • compactness of light source – ability to collect the light and project it
  • weight of luminaire.

Lamp Efficacy

This is a measure of the ability of the light source to convert electrical energy into visible light. It is expressed simply as lumens/watts. One watt of electrical power converted into light of a single wavelength at 555 nm would provide 680 lumens/watt ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required