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2. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   GY6.35 & GZ6.35 – same as G6.35 and only denote what lamp mount clip is needed to hold the actual light bulb in place; G8 – 8 mm (0.31496 in) pin spacing GU8 – same as G8 and only denotes what lamp mount clip is needed to hold the actual light bulb in place; GY8.6 – 8.6 mm (0.33858 in) pin spacing; G9 – 9 mm (0.35433 in) pin spacing

3. Edison screw - Wikipedia

   en.wikipedia.org/wiki/Edison_screw

   230/240-volt incandescent light bulb with E27 screw baseEdison 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.

4. Mogul lamp - Wikipedia

   en.wikipedia.org/wiki/Mogul_lamp

   The center bulb may be very high power (often a three-way, 100-200-300 watt bulb), where the others are usually 60 watts or less. Some models have a night light in the base operated by a foot switch. One model turns the current light settings on or off by moving the lamp pole up or down.

5. Candela - Wikipedia

   en.wikipedia.org/wiki/Candela

   A 25 W compact fluorescent light bulb puts out around 1700 lumens; if that light is radiated equally in all directions (i.e. over 4 π steradians), it will have an intensity of = / = . Focused into a 20° beam (0.095 steradians), the same light bulb would have an intensity of around 18,000 cd or 18 kcd within the beam.

6. Electric light - Wikipedia

   en.wikipedia.org/wiki/Electric_light

   An electric light, lamp, or light bulb is an electrical component that produces light. It is the most common form of artificial lighting . Lamps usually have a base made of ceramic , metal, glass, or plastic which secures the lamp in the socket of a light fixture , which is often called a "lamp" as well.

7. Candelabra - Wikipedia

   en.wikipedia.org/wiki/Candelabra

   A candelabra, with lit candles. A candelabrum (plural candelabra but also used as the singular form) is a candle holder with multiple arms. [1] [2] [3] "Candelabra" can be used to describe a variety of candle holders including chandeliers. However, candelabra can also be distinguished as branched candle holders that are placed on a surface such ...