Toshiba CAF-X116XPL Owner's Manual page 7

(Color indicator)
HEPA filter
replacement indicator
HEPA filter life indicator
Color of the PM2.5 Air quality level
Quality light bar
Blue Great
Green Good
Orange Med
Red Poor
Light sensor function
Light sensor function
Pre filter replacement
indicator
Pre filter life indicator
Understand the Gaseous pollutant grade
Color of the gaseours Air quality level
pollutant grade light bar
Blue Great
Green Good
Orange Med
Red Poor
The air quality light automatically goes on when the purifier is switched on.