Lighting Calculator — Free Online Tool
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Lighting Calculator

Calculate total lumens and number of bulbs required for your room

Lighting Formula: $\text{Total Lumens} = \text{Area (sq. ft.)} \times \text{Foot-candles (Lumens/sq. ft.)}$. Enter your room dimensions and type below.
Room Lighting Parameters Input

Calculation Results

⚠️ Dark-colored walls and ceilings absorb more light, so you may want to increase your total lumen count by 10% to 20% for adequately bright rooms.

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