A Comparison of Light Intensity Measurements of Different Light Sources

The use of a footcandle meter to measure light intensity is not accurate when comparing different light sources. Light intensity measurements were determined for ten different light sources used commonly by the poultry industry. Measurements were made using footcandles and photons for each light source. A correction factor to equate light intensities as photons per footcandle was produced to allow replacement of one light source with another and still maintain the same light intensity in photons.