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2. Flicker (light) - Wikipedia

   en.wikipedia.org/wiki/Flicker_(light)

   In visual perception, flicker is a human-visible change in luminance of an illuminated surface or light source which can be due to fluctuations of the light source itself, or due to external causes such as due to rapid fluctuations in the voltage of the power supply (power-line flicker) or incompatibility with an external dimmer.

3. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   Flicker at power frequency is more noticeable in the peripheral vision than it is when viewed directly. Near the end of life, fluorescent lamps can start flickering at a frequency lower than the power frequency. This is due to instability in the negative resistance of arc discharge, [74] which can be from a bad lamp or ballast or poor connection.

4. Fluorescent lamps and health - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamps_and_health

   Fluorescent bulbs contain mercury, a toxic substance. The United States Environmental Protection Agency (EPA) provides safety guidelines for how to clean up a broken fluorescent bulb. [ 17 ] Mercury can be harmful to children and developing fetuses, so children and pregnant women should avoid being in the area whilst a broken bulb is cleaned up.

5. Twinkle bulb - Wikipedia

   en.wikipedia.org/wiki/Twinkle_bulb

   A twinkle bulb is a special type of light bulb which blinks on and off for decorative effect. They are most commonly used on Christmas lights and other string lights, but can also be used for other ornamental purposes like electric jack-o-lanterns for Halloween and replica traffic lights.

6. Power-line flicker - Wikipedia

   en.wikipedia.org/wiki/Power-line_flicker

   Power-line flicker is a visible change in brightness of a lamp due to rapid fluctuations in the voltage of the power supply. The voltage drop is generated over the source impedance of the grid by the changing load current of an equipment or facility. These fluctuations in time generate flicker.

7. Gas-discharge lamp - Wikipedia

   en.wikipedia.org/wiki/Gas-discharge_lamp

   A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...

8. Deck the House With These Cascading Christmas Lights - AOL

   www.aol.com/cascading-christmas-lights-sure...

   Though that latter task often conjures visions of burned-out bulbs, tangled wires, and colors that just don’t pop, there’s a wide selection of high-quality Christmas lights that won’t leave ...

9. Flicker fusion threshold - Wikipedia

   en.wikipedia.org/wiki/Flicker_fusion_threshold

   The flicker fusion threshold, also known as critical flicker frequency or flicker fusion rate, is the frequency at which a flickering light appears steady to the average human observer. It is a concept studied in vision science , more specifically in the psychophysics of visual perception .