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2. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   An LED flashlight may contain different LEDs for white and colored light, selectable by the user for different purposes. Colored LED flashlights are used for signalling, special inspection tasks, forensic examination, or to track the blood trail of wounded game animals. A flashlight may have a red LED intended to preserve dark adaptation of vision.

3. Infrared lamp - Wikipedia

   en.wikipedia.org/wiki/Infrared_lamp

   Infrared heating uses infrared lamps, commonly called heat lamps, to transmit infrared radiation to the body that is being heated. When a body with a large surface area needs to be heated, an array of infrared lamps is often used. The lamp commonly contains an incandescent bulb that produces infrared radiation.

4. Infrared photography - Wikipedia

   en.wikipedia.org/wiki/Infrared_photography

   Like HIE, the most commonly used infrared color reversal film, also called transparency or slide film, was manufactured by Kodak and sold as Ektachrome Infrared (EIR), under code 2236, packaged as a 36-exposure roll; in addition, Kodak made EIR in bulk lengths (for the motion picture industry) and the similar Aerochrome III Infrared for aerial ...

5. As seen on TV - Wikipedia

   en.wikipedia.org/wiki/As_seen_on_TV

   "As seen on TV" is a generic phrase for products advertised on television in the United States for direct-response mail-order through a toll-free telephone number. As Seen on TV advertisements, known as infomercials , are usually 30-minute shows or two-minute spots during commercial breaks.

6. Why Does My Dog Bark at Nothing? A Trainer Explains the Truth

   www.aol.com/why-does-dog-bark-nothing-132000884.html

   Furthermore, dogs see better in low-light conditions, making them capable of detecting minor changes in their environment more readily than humans, who, by comparison, see better under bright ...

7. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   The materials used for the LED have a direct band gap with energies corresponding to near-infrared, visible, or near-ultraviolet light. LED development began with infrared and red devices made with gallium arsenide. Advances in materials science have enabled making devices with ever-shorter wavelengths, emitting light in a variety of colors.