What is the suggested lighting level for a covered outdoor riding arena?

The selection and placement of lighting depend on the size of the arena and the purpose. Standard lighting recommendations for private riding arenas are different from those for commercial riding facilities. Lumens are a measurement of light output and provide you with information on the perceived brightness in a space.
A foot candle (fc) is equal to a one lumen per square foot.
On the average, private arena lighting is 28.6 or rounded up to 30 lumens per square foot.
In commercial equine stadiums, the average lighting jumps to over 50 lumens per square foot.
These recommendations are based on information available to our equine specialists, who are not facility lighting experts. Please consult with a lighting specialist to further answer your question based on the size of the arena you are lighting.