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2. Dimmer - Wikipedia

   en.wikipedia.org/wiki/Dimmer

   [2] [3] In 1966, Eugene Alessio patented a light bulb socket adapter for adjusting a light level on a single light bulb using a triac. To house this device, he decided on a 2-inch round device with one end capable of being screwed into a light bulb socket and the other end able to receive a light bulb. [4]

3. Childerley - Wikipedia

   en.wikipedia.org/wiki/Childerley

   Childerley is mentioned in the Domesday Book of 1086. Childerley Hall was built by Sir John Cutts after clearing and depopulating the two existing villages of Great Childerley and Little Childerley. [1] There were originally two churches in Childerley, one of which was dedicated to St Mary. Both were demolished by Sir John Cutts. [2]

4. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...