Cities are swapping traditional light bulbs for more energy-efficient brighter LEDs. The rise of these blue LEDs are creating problems for our night sky and our health.
You’re seeing the 60Hz sinusoid caused by using AC electricity. 60 peaks, 60 troughs – but the like is actually turning on and off 120 times per second when on AC, unless it’s first converted to DC. Cheap LEDs just feed AC.
You’re seeing the 60Hz sinusoid caused by using AC electricity. 60 peaks, 60 troughs – but the like is actually turning on and off 120 times per second when on AC, unless it’s first converted to DC. Cheap LEDs just feed AC.