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Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan.
The fluorescence of certain rocks and other substances had been observed for hundreds of years before its nature was understood. One of the first to explain it was Irish scientist Sir George Stokes from the University of Cambridge in 1852, who named the phenomenon "fluorescence" after fluorite, a mineral many of whose samples glow strongly because of impurities.
A parabolic aluminized reflector luminaire 20 PAR cans. A parabolic aluminized reflector lamp (PAR lamp or simply PAR) is a type of electric lamp that is widely used in commercial, residential, and transportation illumination.
Brand stamp. Heatball is a brand name for an incandescent lamp.The brand was used as part of a scheme by Siegfried Rotthäuser, a mechanical engineer from Essen in Germany, to stimulate discussion of EU Regulation 244/2009. [1]
A candi bentar marks the entrance into a Balinese temple Pura Lempuyang Luhur, Bali.. Candi bentar, or split gateway, is a classical Javanese and Balinese gateway entrance commonly found at the entrance of religious compounds, palaces, or cemeteries in Indonesia. [1]
Gabrielle Bonheur "Coco" Chanel (/ ʃ ə ˈ n ɛ l / shə-NEL, French: [ɡabʁijɛl bɔnœʁ kɔko ʃanɛl] ⓘ; 19 August 1883 – 10 January 1971) [2] was a French fashion designer and businesswoman.
The iPhone is a line of smartphones developed and marketed by Apple that run iOS, the company's own mobile operating system.The first-generation iPhone was announced by then–Apple CEO Steve Jobs on January 9, 2007, at Macworld 2007, and launched later that year.