Use the recessed lighting calculator on this page to calculate the placement and spacing for general (ambient) lighting in a room.
Just select the layout, enter the room’s dimensions, and hit calculate.
If you’re unsure of how many lights the room needs, there’s a calculator on this page that will help.
Obviously this calculator does not cover all of the possible room shapes, or all of the possible quantities of recessed lights a room may need.
However, it should give you an idea of how to apply the formula for the placement and spacing of recessed lighting.
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