When lighting a single pleached tree a single 36° beam spotlight is usually the light of choice, positioned close to the trunk about
50cm-100cm with the light pointing straight up. See Fig1
When lighting a row of pleached trees use wider 60° beam spotlights positioned midway between the trees and pointing
straight up. See Fig2 below
Tip: Due to the neat nature usually associated with pleached trees try using recessed lights for this type of installation or even hide spiked fittings in amongst the planting.