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STEP 1 Defne The Area
It is important to understand the area of the surface that you are intending to illuminate. Measuring the area will allow you to determine how much light and how wide of a light beam spread is required for your application.
Determine the square area of the surface to be illuminated.
Measuring the distance will help you determine how much light is required and how it should be directed. The further the light source is away from the surface, the more light will be needed.
Measure the distance between the light source and the center of the surface to be illuminated.
Approximate area: _________square feet
Approximate distance: ________feet
Resource Revised, from Futurelightingsolutions.