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.

Energy Analysis & Daylighting Tools


SkyCalc 2.0 ® operates at three levels of detail:

  • The first level requires little information from the user, instead relying on extensive defaults to describe the user's skylighting system and building operation.
  • The second level allows the user to modify any default in order to describe the situation more precisely.
  • The third level allows the user to enter detailed information about products and schedules such as performance data for specific products or detailed building operation information.

SkyCalc® is a Microsoft Excel-based program. SkyCalc can be downloaded for free.


This program by DIALux is commonly used outside of the US. It’s available in 30 plus languages as well. Dialux can be downloaded for free.

Additional Resources