Emergency lighting color temperature control

An ambient lighting system comprising:

• a light source including:
• a first light channel including a first plurality of white light emitting diodes (LEDs) that produce light at a first correlated color temperature CCT;
• a second light channel including a second plurality of white LEDs that produce light at a second correlated color temperature that is less than the first CCT;
• a variable constant current drive configured to supply DC current to the first light channel and the second light channel;
• an air quality sensor configured to measure a concentration of particles suspended in air proximate the ambient lighting system;
• and
• a controller having an electronic processor configured to:
• receive a signal indicative of the concentration of particles suspended in air proximate the lighting system;
• compare the concentration of particles suspended in air proximate the lighting system to a first threshold;
• increase the DC current supplied to the first light channel when the concentration of particles suspended in air proximate the lighting system is less than the first threshold;
• and
• decrease the DC current supplied to the first light channel when the concentration of particles suspended in air proximate the lighting system is greater than or equal to the first threshold.