Multiple Choice, Multiple Answers

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Streetlights have long been blamed for disrupting moth populations, since many species fly toward artificial light and become easy prey or die from exhaustion circling a bulb until dawn. Entomologists studying the effect closely note that the moths are not actually attracted to light itself but rather lose their normal method of orienting by the moon, which the much closer and brighter streetlamp overwhelms. Switching to certain amber-toned LED fixtures has reduced insect attraction significantly compared with older mercury-vapour lamps, though it has not eliminated the problem entirely. Some towns have trialled motion-activated lighting that stays dim until a pedestrian or vehicle approaches, a measure that has cut nightly insect mortality around trial fixtures without residents reporting reduced feelings of safety.