LED lights are increasingly replacing conventional light bulbs. The advance of LEDs poses new problems for our night sky and our health.

Scientists have found that the night sky has become nearly 10 percent brighter every year for the past decade because artificial lights, especially LEDs, emit too much glare. Street lights are part of the problem, as are sources such as illuminated billboards and stadium lighting. Outdoor lights have a negative impact on health The same outdoor lights also affect people's nightlife. The changes start with what type of LED light you should buy in the first place.