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Light pollution is the human-made alteration of outdoor light levels from those ocurring naturally. It has harmful effects on:

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By Staff
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The rapid advancement of LED technology is unparalleled in the lighting industry, which has caused cities and utilities to reevaluate the specifications used for their street and area lighting applications. Early generation LEDs were typically 5000K or higher, which at the time was the upper end of the technology’s capacity for products that remained both economically viable and energy efficient.
Within just a few short years, the industry has dramatically improved the efficiency of LEDs, ushering in a new generation of 3000K “warmer color” products that emit less blue light. 3000K LED lighting saves energy and lowers costs, protects health and human safety, conserves nocturnal wildlife, and protects nightscapes.
IDA’s new web page describes this issues as well as lists municipalities and organizations which understand the importance of responsible lighting and have taken action to provide their constituents safe, cost effective, environmentally friendly street lighting.