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2. Marks & Spencer's magical light up candles are back for ... - AOL

   www.aol.com/news/marks-and-spencer-light-up...

   Marks & Spencer's best-selling light up candles are back, with all-new designs and scents. Marks & Spencer's magical light up candles are back for Christmas: 'Absolutely beautiful' Skip to main ...

3. List of Marks & Spencer brands - Wikipedia

   en.wikipedia.org/wiki/List_of_Marks_&_Spencer_brands

   M&S TV is an online TV station to advertise goods. [96] The online flower service was accused of unfair trading and using Google to piggy-back advertise on online searches aimed at Interflora online in 2010. [93] The John Lewis shopping chain beat M&S to the title of the UK's best high-street website by late 2010. [97]

4. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Close-up image of a surface-mount LED Close-up of an LED with the voltage being increased and decreased to show a detailed view of its operation A bulb-shaped modern retrofit LED lamp with aluminum heat sink, a light diffusing dome and E27 screw base, using a built-in power supply working on mains voltage

5. Safety lamp - Wikipedia

   en.wikipedia.org/wiki/Safety_lamp

   This straining led first to temporary nystagmus and then to a permanent disability. Mild nystagmus would self-correct if a miner ceased to perform this work, but if left untreated would force a man to give up mining. [6] The lower levels of light emitted by safety lamps caused an increase in the incidence of nystagmus. [7]

6. Incandescent light bulb - Wikipedia

   en.wikipedia.org/wiki/Incandescent_light_bulb

   The basis for light sources used as the standard for color perception is a tungsten incandescent lamp operating at a defined temperature. [86] Spectral power distribution of a 25 W incandescent light bulb. Light sources such as fluorescent lamps, high-intensity discharge lamps and LED lamps have higher luminous

7. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   A LED is a long-lived light source, but certain mechanisms can cause slow loss of efficiency of the device or sudden failure. The wavelength of the light emitted is a function of the band gap of the semiconductor material used; materials such as gallium arsenide , and others , with various trace doping elements , are used to produce different ...