Vehicle brake lights, hazard lights, bicycle lights, and safety lights for pedestrians, walkers, and runners. The human eye perceives light differently depending on its frequency (or wavelength) relative to the condition or degree of ambient lighting. Moreover, the human visual system perceives changes more readily than a static scene or state. Additionally, light in the green/blue part of the visual spectrum is perceived with much greater apparent intensity compared to red, particularly in low ambient light conditions. Accordingly, a lighting system and method that includes using brake lights that provide continuous changes in color during deceleration and, moreover, that uses blue, green, blue-green, yellow-green, and amber (or yellow) light or combinations thereof.