The convergence of light emitting diode (LED) advancements, new federal energy mandates and the development of special funding programs have given the traffic signal market a green light for growth.rnHistorically, inexpensive but inefficient incandes-cent bulbs lit up traffic signals. In the late 1990s, utility companies around the country started offering incentive programs to retrofit systems with efficient lamp technologies. Communities in energy-restrictive areas, such as California, Arizona, Colorado, Minnesota and Pennsylvania, led the charge to convert to LED technology.
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