Cyalume SnapLight Industrial Grade Chemical Light Sticks, Yellow, High Intensity, 6" Long (Pack of 10) SnapLight industrial grade light stick provides 360 degrees of illumination Hook and gate top for hanging or attaching the light Chemiluminescent substance is non-toxic and plastic body is phthalate free for safety Five-year shelf life from date of manufacture for a maintenance-free alternative to other lighting SnapLight industrial grade light stick provides 360 degrees of illumination Chemiluminescent substance is non-toxic and plastic body is phthalate free for safety Five-year shelf life from date of manufacture for a maintenance-free alternative to other lighting Great source of safe light in an emregency-generates no heat or electrical spark Great source of safe light in an emregency-generates no heat or electrical spark Long lasting, super bright formula Unlike other light sticks, specially designed to last for 4+ years Inexpensive and disposable. Non-toxic and non-flammable Waterproof. Individually wrapped.