The intensity of the in-cage illumination was 11-28 lux, depending on orientation of the light meter.
The light intensity was 16,000-18,000 lux at 50 cm from the light source.
To obtain reproducible light intensity, the irradiation power at the fiber outlet was measured using a digital lux tester.
Light from the television was 10-20 lux.
To reduce blackfly activity, dim (less than 50 lux) torchlight was directed up from beneath the chamber as the only illumination.
The floodlighting system, with a density of 2000 lux, has been inaugurated in 2008.
Light intensity is usually low (e.g. less than one lux) to reduce feather pecking.
It is usually measured in units of lux. 100 lux or less is usually considered low intensity or indirect lighting.
