Wheel Bee LED backpack City Lights

Material: NEW - two tone Polyester 600D - double rubberized inside reinforcement for water resistance and durability Dimensions: 40x30x15 cm Volume: 18L Powered by: 2 x CR2032 button batteries (included) Color: Grey Features: INTEGRATED LED LIGHT for increased visibility and safety | USB PORT with cable | Headphone exit | Reflective stripes | Bicycle SEAT COVER for rain protection | 1 large department, 1 smaller department, 1 hidden »safe« pocket | Lap top department | Powerbank pocket | Accessories organizer | Hard and padded back with air circulation system | Padded shoulder straps Why we use GREEN LED lights and not any other ? The human eye sees color over wavelengths ranging roughly from 400 nanometers (violet) to 700 nanometers (red). Light from 400-700 nanometers is called visible light or the visible spectrum (see »Visible Spectrum Table«). The human eye response is most sensitive in the green, peaking around 555nm (see »Eye Color Sensitivity« chart). Conclusion: Green color is the most sensitive and visible color for the human eye and therefore the most suitable to use for the road users visibility and safety !