Calculates the optimal spacing and number of recessed lights needed for a room, based on room dimensions and desired lighting levels.
Start with your values, or try a preset.
Enter Room Length (feet), Room Width (feet), Light Coverage (feet), and Desired Light Level in the units shown.
Read Number of Lights Along Width, Number of Lights Along Length, Spacing Between Lights (Widthwise, feet), Spacing Between Lights (Lengthwise, feet), and Total Number of Lights in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Room Length (feet): 14 ft; Room Width (feet): 10 ft; Light Coverage (feet): 4 ft; Desired Light Level: General Lighting
Number of Lights Along Width: 3; Number of Lights Along Length: 4; Spacing Between Lights (Widthwise, feet): 3.333333333; Spacing Between Lights (Lengthwise, feet): 3.5; Total Number of Lights: 12
Room Length (feet): 16 ft; Room Width (feet): 12 ft; Light Coverage (feet): 3 ft; Desired Light Level: Task Lighting
Number of Lights Along Width: 4; Number of Lights Along Length: 5; Spacing Between Lights (Widthwise, feet): 3; Spacing Between Lights (Lengthwise, feet): 3.2; Total Number of Lights: 20
Room Length (feet): 12 ft; Room Width (feet): 10 ft; Light Coverage (feet): 4 ft; Desired Light Level: General Lighting
Number of Lights Along Width: 3; Number of Lights Along Length: 3; Spacing Between Lights (Widthwise, feet): 3.333333333; Spacing Between Lights (Lengthwise, feet): 4; Total Number of Lights: 9
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