What is Light Uniformity?

What is Light Uniformity?

As the name suggests, this is a measure of how "uniform" or even the light levels are in an area - i.e. the variation between darker and lighter areas. Usually abbreviated to U0 in lighting designs, it is measured on a scale of 0-1, with higher values being better. Careful consideration of boundary zones (the perimeter area excluded from the calculations) must be taken to ensure the area being analysed is representative of the usage.