A night light is a small light fixture, usually an electric light fixture. For comfort or convenience, it is placed in a dark area or an area that may become dark at certain times (such as at night or in an emergency). Long-burning small candles with similar functions are called "tea wax".


  1. Uses and culture
    People often use night lights to gain a sense of security, which can turn on the lights or reduce the fear of darkness, especially in young children. The night light is also useful to the public, it can show the overall layout of the room without turning on the headlights, thus avoiding tripping over stairs, obstacles or pets, or marking emergency exits. Exit signs often use tri in the form of a. Homeowners usually place night lights in bathrooms, kitchens, and hallways to avoid turning on the main lights, especially late at night, and adapt their eyes to bright light.

To avoid tripping or falling in unfamiliar night environments, some people who travel frequently install small night lights temporarily in rooms and bathrooms. Gerontologists recommend using night lights to prevent falls, which can endanger the lives of older people.

Low-cost night lights have contributed to the proliferation of various decorative designs, some with superheroes and fantastic designs, while others have the basic simplicity of small light-emitting discs.

  1. Light sources and variants
    Early electronic night lights used small incandescent or small neon lights to provide lighting and were much safer than small candles using open flames. The neon version consumes very little energy and has a long life, but there is a tendency to flicker (reminiscent of candles). Some users like it while others are annoying. In the 1960s, night lights appeared, which were characterized by low-power electroluminescent panels emitting soft green or blue light. Similar lights are still available today.

 

Some nightlights have photocells that can be turned off when the ambient light is bright enough. Other designs also have a built-in PIR sensor to detect motion and only turn on when someone passes in the dark. With the advent of low-cost LEDs, many different variants have emerged, with different colors that are sometimes changed automatically or in a user-controllable manner.


  1. hidden dangers
    The US Consumer Product Safety Commission reports that it receives about 10 reports each year, citing fires caused by night lights close to flammable materials. They recommend using lower light bulbs at night than the four or seven watt incandescent bulbs still used in some older products

 

Another study showed that sleeping with the lights on protects the eyes of people with diabetes from retinopathy, a condition that can cause blindness. However, the initial research is inconclusive.

Some people say that the best light conditions for sleeping are complete darkness.  If night light is used in the sleeping area, it is recommended to choose a dark red light to minimize the damaging impact on the sleep cycle. In addition, night lights may be useful in places other than sleeping areas (such as corridors, bathrooms or kitchens) to allow late night travel without turning on full light while maintaining a dark sleeping environment


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