Dusk in July, and the light over Fernridge Park goes lavender while the last mower of the day is still running somewhere down the block. Luna Tree Care LLC keeps company with that hour in West Hartford — the cool end of a hot day, when cut grass smells strongest and a freshly edged walk holds a shadow line sharp as a pencil stroke. The work is straightforward and done with care: mowing at a height that protects the roots, trimming close where machines can't reach, clearing every clipping off the hardscape before leaving. Lawns in this town live under a lot of canopy, and shade turf rewards a gentle, attentive hand. There is real pleasure in walking off a property at nightfall and seeing it look settled.