Our mission at Bristolite is to provide our customers with the highest quality products and supreme service at an exceptional value. We also aim to provide the industry with an abundance of accurate and useful information relative to daylighting and energy conservation. We take our corporate responsibility to our employees, associates, industry colleagues and customers very seriously and we see ourselves as stewards for the efficient use of sustainable carbon free energy.

Daylighting Roof Area Percentage Per Building Use


  • 2% for 20 - 40 Foot Candles (FC) for open, bulk storage warehouse or racked or mechanized warehouses.
  • 3% for 20 – 30 FC for racked storage manual picking warehouse, isles 6’ wide or greater, skylights down the aisles with 40’ – 48’ spacing.
  • 3% - 4% for 40 – 60 FC for light manufacturing.  (60 FC is recommended for general office).
  • 4% - 5% for 50 – 80 FC for retail and/or more detailed manufacturing.

Daylighting less than 2% creates dark spots between the skylights and increases the possibility of equipment or racks blocking the spread of light.

Daylighting more than 5% and the cost benefit begin to decline. The benefit may be a need for higher FC but the electric light savings generally peak around 5%.