Duck CheckedVertical-budget calculator
Is there enough room for plants and lights?
The empty opening looks generous until the tray, pot, fixture body, hanger, light gap, and actual plant all take a slice.
Adjustment travel is real height
A light that can move is useful only when the chain, pulley, bracket, and cord still work at both ends of the travel.
Current primary guidance: University of Minnesota Extension on light distance, intensity, and plant response, reviewed 2026.