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2. Ring flash - Wikipedia

   en.wikipedia.org/wiki/Ring_flash

   Power is supplied by batteries in the shoe-mount unit and a cable conveys power and control signals to the circular flash unit. In larger ring flashes, which are typically used for fashion photography, power may be supplied by an external battery or line power supply, or the power supply and light may be combined in one unit. [5] Light is ...

3. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   An LED strip, tape, or ribbon light is a flexible circuit board populated by surface-mount light-emitting diodes (SMD LEDs) and other components that usually comes with an adhesive backing. Traditionally, strip lights had been used solely in accent lighting, backlighting, task lighting, and decorative lighting applications, such as cove lighting .

4. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   For indoor use, tiny surface mount high-efficiency LEDs can easily light up with 1 mA (0.001 A) or more current, which most digital logic outputs can easily source or sink. Using the algebraic formula (above) and assuming V s w i t c h {\displaystyle V_{switch}} is 0 (to simplify examples), the resistance is calculated as follows:

5. LED stage lighting - Wikipedia

   en.wikipedia.org/wiki/LED_stage_lighting

   LED stage lights come in three main types. PAR cans, striplights [1] and 'moving head' types [citation needed]. In LED PAR cans, a round printed circuit board with LEDs mounted on is used in place of a PAR lamp. Moving head types can either be a bank of LEDs mounted on a yoke or more conventional moving head lights with the bulb replaced with ...

6. SAE J2954 - Wikipedia

   en.wikipedia.org/wiki/SAE_J2954

   SAE J2954 is a standard for wireless power transfer (WPT) for electric vehicles led by SAE International. It defines three classes of charging speed, WPT 1, 2 and 3, at a maximum of 3.7 kW, 7.7 kW and 11 kW, respectively. This makes it comparable to medium-speed wired charging standards like the common SAE J1772 system.

7. News, Politics, Sports, Mail & Latest Headlines - AOL.com

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.