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2. Patrick Woodroffe (lighting designer) - Wikipedia

   en.wikipedia.org/wiki/Patrick_Woodroffe...

   The company operates globally designing lighting for many different genres including music, theatrical performance, special events as well as permanent architectural entertainment installations. In 2013 he was made a Royal Designer for Industry by the RSA and he was awarded an Officer of the Order of the British Empire (OBE) in the 2014 ...

3. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   The light is not the same as a true black body, giving a different appearance to colors than an incandescent bulb. Color rendering quality is specified by the color rendering index (CRI), and as of 2019 is about 80 for many LED bulbs, and over 95 for more expensive high-CRI LED lighting (100 is the ideal value). [citation needed]

4. Lumen maintenance - Wikipedia

   en.wikipedia.org/wiki/Lumen_maintenance

   Lumen maintenance compares the amount of light produced from a light source or from a luminaire when it is brand new to the amount of light output at a specific time in the future. For instance, if a luminaire produced 1,000 lumens of light when it was brand new and now produces 700 lumens of light after 30,000 hours, then it would have lumen ...

5. AC/DC - Wikipedia

   en.wikipedia.org/wiki/AC/DC

   AC/DC were formed in the Australian pop music scene of the early to mid-1970s, [2] which is described as the third wave of rock music. [3] Many local 1960s artists – e.g., the Easybeats and the Masters Apprentices, had attempted to gain international recognition but achieved limited commercial success overseas and disbanded after returning to Australia.

6. Luminous flux - Wikipedia

   en.wikipedia.org/wiki/Luminous_flux

   Luminous flux (in lumens) is a measure of the total amount of light a lamp puts out. The luminous intensity (in candelas) is a measure of how bright the beam in a particular direction is. If a lamp has a 1 lumen bulb and the optics of the lamp are set up to focus the light evenly into a 1 steradian beam, then the beam would have a luminous ...

7. Foot-candle - Wikipedia

   en.wikipedia.org/wiki/Foot-candle

   In the US lighting industry, foot-candles are a common unit of measurement used by architects to calculate adequate lighting levels. Foot-candles are also commonly used in the museum and gallery fields in the US, where lighting levels must be carefully controlled to conserve light-sensitive objects such as prints, photographs, and paintings, the colors of which fade when exposed to bright ...