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2. Holiday lighting technology - Wikipedia

   en.wikipedia.org/wiki/Holiday_lighting_technology

   There are also multi-LED screw-in bulbs which replace real C 7 + 1 ⁄ 2 and C 9 + 1 ⁄ 4 bulbs and are much closer in brightness than the mini imitations. [citation needed] 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.

3. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A selection of consumer LED lamps available in 2012 as drop-in replacements for incandescent bulbs in screw-type sockets LED lamps are made with standard lamp connections and shapes, such as an Edison screw base, an MR16 shape with a bi-pin base, or a GU5.3 (bi-pin cap) or GU10 (bayonet fitting) and are made compatible with the voltage supplied ...

4. Edison screw - Wikipedia

   en.wikipedia.org/wiki/Edison_screw

   Edison screw (ES) is a standard lightbulb socket for electric light bulbs. It was developed by Thomas Edison (1847–1931), patented in 1881, [ 1 ] and was licensed in 1909 under General Electric's Mazda trademark.

5. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   The light bulb commonly used since the early 20th century for general-purpose lighting applications, with a pear-like shape and an Edison screw base, is referred to as an "A-series light bulb." This most common general purpose bulb type would be classed as "A19/E26" or the metric version "A60/E27".

6. Solid-state lighting - Wikipedia

   en.wikipedia.org/wiki/Solid-state_lighting

   An assortment of LED lamps commercially available as of 2010 as replacements for screw-in bulbs, including floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications

7. Bubble light - Wikipedia

   en.wikipedia.org/wiki/Bubble_light

   Common screw-in bubble light. A bubble light is a decorative device consisting of a liquid-filled vial that is heated and illuminated by an incandescent light bulb.Because of the liquid's low boiling point, 39.6°C (103.3°F), the modest heat generated by the lamp causes the liquid to boil and bubble up from the vial's base thus creating a decorative effect.