Amber improves contrast and does not degrade scotopic or night adapted vision.
Red improves contrast and aids in reading red-light-readable topographic maps.
Amber High 20 lumens / 2.75 hours*
Amber Low 5 lumens / 29 hours*
Red High 39 lumens / 3 hours*
Red Low 1 lumen / 57 hours*
*Runtime until output drops below 50 lumens