Cyalume Model 20 LightStation With 40 Yellow High Intensity 10" Industrial Grade SnapLights, 4 Hour Duration, Red Case LightStation Model 20 emergency lighting system with yellow SnapLight light sticks Red, fire-resistant case with a luminescent label for use in the dark Light sticks measure 10" long and provide 360 degrees of illumination for four hours Chemiluminescent substance in the light stick is non-toxic and plastic body is phthalate free for safety Light sticks have a five-year shelf life from date of manufacture for a maintenance-free alternative to other lighting