The glow of eleclric lights illuminat-ing the nights of ever-brighter citieshas been regarded as one of the signsof prosperity and modem civilization.And when darkness draws the curtains onChinese cities, a bevy of diverse lightingsystems come on. Some cast beams on thewalls of buildings, others radiate neon glowadvertising, and still others light the way forstreams of traffic. Others come on from thetraffic itself.

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