out there he still did not exist ; inside the strip lighting above the bar automatically switched hue as it marked the passage of time as regularly as the airport shuttle ; the warm red gave way to incandescent green , giving the woman 's skin an even more unhealthy lizard like tinge and it gave the bar a sudden clinical feel ; the kind of ambiance a public toilet has , where fluorescent lighting is employed to prevent drug addicts from locating their veins .