Hy-Line; Understanding Poultry Lighting

Understanding the Difference between Lux and Clux

While peak lux can be assessed at any wavelength, the International Commission on Illumination (CIE) standard for measuring light intensity is set at the peak human response of 550–560 nm. Chickens have three photopic spectral peaks, so additional calculations utilizing the poultry-specific peaks are required to measure these clux. Depending on the light source and peak spectrum, clux can be up to 50% or higher in light intensity than lux.

Understanding the difference between lux and clux provides a more accurate selection of light bulbs for the producer and allows them to recognize the limitations of traditional light meters. While using a traditional light meter can be an indicator of light intensity in a house, there will always be a difference between lux and clux.