low light contrast ration calculation

Hello!

The current contrast ratio formula does not take into low lighting conditions, and instead only accounts for normal ambient light. What is the contrast ratio formula that I can use to ensure we are following standards for low lighting conditions?

Thank you,
Rachael

Rachael  Daniels
Sr. Human Factors Team Lead, User Experience
rachael.daniels@cerner.com<mailto:rachael.daniels@cerner.com> | 816.888.2663 direct
Cerner Corporation | www.cerner.com<http://www.cerner.com>



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