lighting products solutions

 types of lighting products/technology

- incandescent
- halogen
- high intensity discharge (HID)
- flourescent

• people

• michael faraday - electromagnetic theory
• james maxwell 

• A E becquerel

• PC hewitt

• edmund germer 

- induction
- light emitting diode (LED)

• invented by soviet russian scientist oleg losev in 1924
• pearl LED

• supplier

• www.contex.com.hk 

- photoluminescent

glass tubes
- techniques

• blowing
• pressing
• drawing

A rushlight is a type of candle or miniature torch formed by soaking the dried pith of the rush plant in fat or grease. For several centuries rushlights were a common source of artificial light for poor people throughout the British Isles. They were extremely inexpensive to make. English essayist William Cobbett wrote, "This rushlight cost almost nothing to produce and was believed to give a better light than some poorly dipped candles." One of the earliest printed descriptions of rushlights was written by English antiquary John Aubrey in 1673. Rev. Gilbert White gave a detailed description of rushlight making in The Natural History and Antiquities of Selborne, Letter XXVI (1789).Rushlights were still used in rural England to the end of the 19th century, and they had a temporary revival during World War II.^[2] In parts of Wales the use of rushlights continued into the middle of the 20th century.It is not clear whether rushlights were ever popular in the United States and Canada. Antique rushlight holders are occasionally found in North America, but most were probably imported from England; "none are known to bear the mark of an American smith."^[4] In New England, "rushlights were used little if at all in colonial days."Rushlights should not be confused with rush-candles. A rush-candle is an ordinary candle (a block or cylinder of tallow or wax) that uses a piece of rush as a wick. Rushlights, by contrast, are strips of plant fiber impregnated with tallow or grease. The wick is not separate from the fuel in a rushlight. 

Photoluminescence (abbreviated as PL) is light emission from any form of matter after the absorption of photons (electromagnetic radiation). It is one of many forms of luminescence (light emission) and is initiated by photoexcitation (i.e. photons that excite electrons to a higher energy level in an atom), hence the prefix photo-.^[1] Following excitation various relaxation processes typically occur in which other photons are re-radiated. Time periods between absorption and emission may vary: ranging from short femtosecond-regime for emission involving free-carrier plasma in inorganic semiconductors^[2] up to milliseconds for Phosphorescence processes in molecular systems; and under special circumstances delay of emission may even span to minutes or hours. Observation of photoluminescence at a certain energy can be viewed as an indication that an electron populated an excited state associated with this transition energy. While this is generally true in atoms and similar systems, correlations and other more complex phenomena also act as sources for photoluminescence in many-body systems such as semiconductors. A theoretical approach to handle this is given by the semiconductor luminescence equations.

neon signs
- First unveiled at the Paris Auto Show in 1910, neon signs quickly took the world by storm. London, New York, Paris, Las Vegas, Vancouver all have made their mark in neon. Hong Kong is also known for these gas infused signs. https://www.meetup.com/Hong-Kong-Sacred-Spaces/events/273112533/

japan
- The traditional lighting equipment of Japan includes the andon (行灯), the bonbori (雪洞), the chōchin (提灯), and the tōrō (灯篭).