Moonlighting is a landscape lighting technique designed to replicate the effect of moonlight shining through the branches and filtering through the foliage of a tree. This technique creates soft and subtle ambient illumination that casts shadows and accentuates what is under the tree (paths, sidewalks, flower beds, etc.). The tranquil effect created by the light diffused by leaves and branches makes people feel that they're bathed under the light of the "moon". Moon lighting fixtures are concealed high in the tree and aimed straight down as much as possible to prevent glare. Moonlighting is generally accomplished using flood lights or spotlights.
Image courtesy of Cast Lighting
Image courtesy of Cast Lighting