Methods of light measurement
Learning Event 2:
DESCRIBE THE TECHNIQUE OF USING LIGHT METERS
1. As discussed in Lesson 1, it is necessary for us to measure both lighting
ratios and contrast ratios.
2. Lighting ratios are realized by measuring the difference in light intensity
being emitted by different lighting instruments. Lighting ratios are measured
by using incident light readings. For example: to measure the lighting ratio
between the key light and the fill light, when setting up three-point lighting,
turn on just the key light and measure its light intensity. Then turn off the
key light and turn on just the fill light.
intensity. If the key light intensity is 100 footcandles and the fill light's
intensity is 50 footcandles, then the lighting