A nightlight is a small light fixture, usually electrical, placed for comfort or convenience in dark areas or areas that may become dark at certain times, such as at night or during an emergency. Small long-burning candles serving a similar function are referred to as "tealights".
People usually use nightlights for the sense of security which having a light on provides, or to relieve fear of the dark, especially in young children. Nightlights are also useful to the general public by revealing the general layout of a room without requiring a major light to be switched on, for avoiding tripping over stairs, obstacles, or pets, or to mark an emergency exit. Exit signs often use tritium radioluminescence. Homeowners usually place nightlights in bathrooms, kitchens and hallways to avoid turning on the main light fixture, especially late at night, and causing their eyes to adjust to the brighter light.[1]
Some frequent travelers carry small nightlights for temporary installation in their guestroom and bathroom, to avoid tripping or falls in an unfamiliar nighttime environment. Gerontologists have recommended use of nightlights to prevent falls, which can be life-threatening to the elderly.[2]
The low cost of nightlights has enabled a proliferation of different decorative designs, some featuring superheros and fantastical designs, while others feature the basic simplicity of a small luminous disc.
Early electrical nightlights used small incandescent lamps or small neon lamps to provide light, and were much safer than small candles using an open flame. The neon versions consumed very little energy and had a long life, but had a tendency to flicker on and off (reminiscent of a candle), which some users liked and others found annoying. In the 1960s, small nightlights appeared that featured a low-power electroluminescent panel emitting soft green or blue light; similar lights are still available today.[4]
Some nightlights include a photocell, which enables them to switch off when the ambient light is sufficiently bright. Other designs also feature a built-in passive infrared sensor to detect motion, and only switch on when somebody is passing by in the dark. With the availability of low-cost LEDs, many different variants have become available, featuring different colours, sometimes changing automatically or in a user-controllable way.
Safety hazardEdit
The US Consumer Product Safety Commission, or UCPSC, reports it receives about 10 reports per year where nightlights close to flammable materials were cited as responsible for fires; they recommend the use of nightlights with bulbs cooler than the four or seven watt incandescent bulbs still used in some older products.[5]
Potential health issues and benefitsEdit
A University of Pennsylvania study indicated that sleeping with the light on or with a nightlight was associated with a greater incidence of nearsightedness in children.[6] However, a later study at Ohio State University contradicted the earlier conclusion.[7] Both studies were published in the journal Nature.
Another study has indicated that sleeping with the light on may protect the eyes of diabetics from retinopathy, a condition that can lead to blindness.[8] However, the initial study is still inconclusive.
The optimal sleeping light condition is said by some to be total darkness.[9] If a nightlight is used within a sleeping area, it is recommended to choose a dim reddish light to minimize disruptive effects on sleep cycles.[10][1] In addition, nightlights may be useful in locations other than sleeping areas, such as hallways, bathrooms, or kitchens, to allow late night trips to be made without turning on the full light, while preserving a dark sleeping environment.[2]
ReferencesEdit
^ ab. National Sleep Foundation. Archived from the original on February 1, 2019. Retrieved June 23, 2015.
^ abMcMurdo, M E; Gaskell, A (1991). "Dark adaptation and falls in the elderly". Gerontology. 37 (4): 221–4. doi:10.1159/000213264. PMID 1916313.
^Reed, S. Alexander; Sandifer, Elizabeth (February 13, 2014). "Blue Canary in the Outlet by the Light Switch, Who Watches Over You?". Slate Magazine.
^"Electroluminescent Lamps - How They Work & History". www.edisontechcenter.org. Retrieved 2017-02-16.
^"Night Lights Don't Lead To Nearsightedness, Study Suggests". Science Daily. March 9, 2000. Retrieved March 23, 2009.
^"Light at Night Protects Diabetics' Eyes". WebMD. June 27, 2002. Retrieved March 23, 2009.
^Rettner, Rachel (17 November 2010). "Avoiding Depression: Sleeping in Dark Room May Help". Live Science. Retrieved 23 June 2015.
^Hyman, Mark (8 November 2013). "How a Light Bulb Can Help You Sleep Better". The Huffington Post. Retrieved 2017-02-16.
External linksEdit
The dictionary definition of nightlight at Wiktionary
August 25, 2023
nightlight, other, uses, disambiguation, nightlight, small, light, fixture, usually, electrical, placed, comfort, convenience, dark, areas, areas, that, become, dark, certain, times, such, night, during, emergency, small, long, burning, candles, serving, simil. For other uses see Nightlight disambiguation A nightlight is a small light fixture usually electrical placed for comfort or convenience in dark areas or areas that may become dark at certain times such as at night or during an emergency Small long burning candles serving a similar function are referred to as tealights An LED nightlight Contents 1 Uses and cultures 2 Light source and variants 3 Safety hazard 4 Potential health issues and benefits 5 References 6 External linksUses and cultures EditPeople usually use nightlights for the sense of security which having a light on provides or to relieve fear of the dark especially in young children Nightlights are also useful to the general public by revealing the general layout of a room without requiring a major light to be switched on for avoiding tripping over stairs obstacles or pets or to mark an emergency exit Exit signs often use tritium radioluminescence Homeowners usually place nightlights in bathrooms kitchens and hallways to avoid turning on the main light fixture especially late at night and causing their eyes to adjust to the brighter light 1 Some frequent travelers carry small nightlights for temporary installation in their guestroom and bathroom to avoid tripping or falls in an unfamiliar nighttime environment Gerontologists have recommended use of nightlights to prevent falls which can be life threatening to the elderly 2 The low cost of nightlights has enabled a proliferation of different decorative designs some featuring superheros and fantastical designs while others feature the basic simplicity of a small luminous disc The 1990 song Birdhouse in Your Soul by They Might Be Giants is a song sung from the perspective of a nightlight 3 Light source and variants Edit Electroluminescent nightlights use little electrical powerEarly electrical nightlights used small incandescent lamps or small neon lamps to provide light and were much safer than small candles using an open flame The neon versions consumed very little energy and had a long life but had a tendency to flicker on and off reminiscent of a candle which some users liked and others found annoying In the 1960s small nightlights appeared that featured a low power electroluminescent panel emitting soft green or blue light similar lights are still available today 4 Some nightlights include a photocell which enables them to switch off when the ambient light is sufficiently bright Other designs also feature a built in passive infrared sensor to detect motion and only switch on when somebody is passing by in the dark With the availability of low cost LEDs many different variants have become available featuring different colours sometimes changing automatically or in a user controllable way Safety hazard EditThe US Consumer Product Safety Commission or UCPSC reports it receives about 10 reports per year where nightlights close to flammable materials were cited as responsible for fires they recommend the use of nightlights with bulbs cooler than the four or seven watt incandescent bulbs still used in some older products 5 Potential health issues and benefits EditA University of Pennsylvania study indicated that sleeping with the light on or with a nightlight was associated with a greater incidence of nearsightedness in children 6 However a later study at Ohio State University contradicted the earlier conclusion 7 Both studies were published in the journal Nature Another study has indicated that sleeping with the light on may protect the eyes of diabetics from retinopathy a condition that can lead to blindness 8 However the initial study is still inconclusive The optimal sleeping light condition is said by some to be total darkness 9 If a nightlight is used within a sleeping area it is recommended to choose a dim reddish light to minimize disruptive effects on sleep cycles 10 1 In addition nightlights may be useful in locations other than sleeping areas such as hallways bathrooms or kitchens to allow late night trips to be made without turning on the full light while preserving a dark sleeping environment 2 References Edit a b National Sleep Foundation National Sleep Foundation Archived from the original on February 1 2019 Retrieved June 23 2015 a b McMurdo M E Gaskell A 1991 Dark adaptation and falls in the elderly Gerontology 37 4 221 4 doi 10 1159 000213264 PMID 1916313 Reed S Alexander Sandifer Elizabeth February 13 2014 Blue Canary in the Outlet by the Light Switch Who Watches Over You Slate Magazine Electroluminescent Lamps How They Work amp History www edisontechcenter org Retrieved 2017 02 16 Fire Hazard with Nightlights CPSC Document 5063 US Consumer Product Safety Commission Archived from the original on August 13 2011 Retrieved May 12 2011 Is Nearsightedness in Children Linked to Night Light Exposure During Sleep Before Age Two PDF Science NetLinks American Association for the Advancement of Science Archived from the original PDF on December 3 2008 Retrieved March 23 2009 Night Lights Don t Lead To Nearsightedness Study Suggests Science Daily March 9 2000 Retrieved March 23 2009 Light at Night Protects Diabetics Eyes WebMD June 27 2002 Retrieved March 23 2009 Rettner Rachel 17 November 2010 Avoiding Depression Sleeping in Dark Room May Help Live Science Retrieved 23 June 2015 Hyman Mark 8 November 2013 How a Light Bulb Can Help You Sleep Better The Huffington Post Retrieved 2017 02 16 External links Edit The dictionary definition of nightlight at Wiktionary Retrieved from https en wikipedia org w index php title Nightlight amp oldid 1165802543, wikipedia, wiki, book, books, library,
