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2. Sodium-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Sodium-vapor_lamp

   Low-pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night. Single ended self-starting lamps are insulated with a mica disc and contained in a borosilicate glass gas discharge tube (arc tube) and a metal cap. [3] [4] They include the sodium-vapor lamp that is the gas-discharge lamp in street lighting. [5 ...

3. Nightlight - Wikipedia

   en.wikipedia.org/wiki/Nightlight

   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 ".

4. The Best Night Lights for Kids, According to Parents ... - AOL

   www.aol.com/best-night-lights-kids-according...

   PureWow Editors select every item that appears on this page,, and the company may earn compensation through affiliate links within the story You can learn more about that process here. Yahoo Inc ...

5. Architectural lighting design - Wikipedia

   en.wikipedia.org/wiki/Architectural_lighting_design

   The history of electric light is well documented, [11] and with the developments in lighting technology the profession of lighting developed alongside it. The development of high-efficiency, low-cost fluorescent lamps led to a reliance on electric light and a uniform blanket approach to lighting, but the energy crisis of the 1970s required more design consideration and reinvigorated the use of ...

6. Lighting - Wikipedia

   en.wikipedia.org/wiki/Lighting

   Artificial light at night refers to any light source other than a natural light source. Sources of artificial light include LEDS and fluorescents. This particular light source has effect on the reproduction, immune function, metabolism, thermoregulation and body temperature of organisms that need light for their daily activity.

7. LED street light - Wikipedia

   en.wikipedia.org/wiki/LED_street_light

   The Madrid study said this was caused by the high level of radiation in the 'blue band'. [31] [32] Artificial night-time lighting has various effects on humans (not to mention wildlife) and exposure to optical radiation affects human physiology and behavior, both directly and indirectly.