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2. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   In 2016 Government of India launched 'Ujala LED bulb scheme' to lower India's carbon footprint and save electricity, it distributed 370 million LED bulbs free, by doing so as of March 2022, which resulted in saving of ₹ 200 billion (US$2.3 billion) of middle class and poor household power bill. The scheme is intended to replace all the ...

3. Maglite - Wikipedia

   en.wikipedia.org/wiki/Maglite

   2012: The V4 was released with a newly developed electronic switch enabling a Multi Mode operation and a slightly more powerful bulb producing an output of 245 Lumens. 2012: In August, Maglite announced several new models including an LED version of the Solitaire, a Mini Maglite LED 2 AAA and a new version of the 2D LED termed the 2D LED Pro ...

4. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Efficiency: LEDs emit more lumens per watt than incandescent light bulbs. [63] The efficiency of LED lighting fixtures is not affected by shape and size, unlike fluorescent light bulbs or tubes. Size: LEDs can be very small (smaller than 2 mm 2 [64]) and are easily attached to printed circuit boards.

5. Haitz's law - Wikipedia

   en.wikipedia.org/wiki/Haitz's_law

   In 2010, Cree Inc., developed and marketed the XM-L LED that claimed 1000 lumens at 100 lm/W efficacy and 160 lm/W at 350 mA and 150 lm/W at 700 mA. [7] They also claimed to have broken the 200 lm/W barrier in R&D with a prototype producing 208 lm at 350 mA. [8] In May 2011, Cree announced another prototype with 231 lm/W efficacy at 350 mA. [9]

6. Luminous efficacy - Wikipedia

   en.wikipedia.org/wiki/Luminous_efficacy

   Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.

7. Lumen (unit) - Wikipedia

   en.wikipedia.org/wiki/Lumen_(unit)

   A 470-lumen LED lamp. It consumes about one sixth the electrical power of an incandescent light bulb producing the same light. Lamps used for lighting are commonly labelled with their light output in lumens; in many jurisdictions, this is required by law. A 23 W spiral compact fluorescent lamp emits about 1,400–1,600 lm.