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2. Holiday lighting technology - Wikipedia

   en.wikipedia.org/wiki/Holiday_lighting_technology

   In the modern age, LEDs have emerged with RGB technology to allow Christmas lights to display a possible range of around 4.6 billion colors. One alternative is the use of RGBW technology which also adds the ability for lights to allow display a range of whites from warmer to cooler.

3. Christmas lights - Wikipedia

   en.wikipedia.org/wiki/Christmas_lights

   Christmas lights (also called twinkle lights, holiday lights, mini lights or fairy lights), that are strands of electric lights used to decorate homes, public/commercial buildings and Christmas trees during the Christmas season are amongst the most recognized forms of Christmas lighting. Christmas lights come in a dazzling array of ...

4. Keller family uses 20,000 lights, 400 drones for a Christmas ...

   www.aol.com/keller-family-uses-20-000-224819802.html

   The family’s Christmas light display includes two components, an over 20,000 light array on the house and a show featuring 400 drones above. Both displays combine to tell the story of penguin ...

5. Christmas tree (drag racing) - Wikipedia

   en.wikipedia.org/wiki/Christmas_tree_(drag_racing)

   A common Christmas tree consists of a column of seven lights for each driver or lane. Each side of the column of lights is the same. At an NHRA national event, the Christmas Tree, which was first used in April 2011, from the top down, consists of a blue LED light set (top and bottom halves), then three amber bulbs, then a green bulb and a red ...

6. Light - Wikipedia

   en.wikipedia.org/wiki/Light

   Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1] Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz.

7. Visible spectrum - Wikipedia

   en.wikipedia.org/wiki/Visible_spectrum

   The visible range of most animals evolved to match the optical window, which is the range of light that can pass through the atmosphere. The ozone layer absorbs almost all UV light (below 315 nm). [19] However, this only affects cosmic light (e.g. sunlight), not terrestrial light (e.g. Bioluminescence).