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The problem of flickering exists only when using the bulb in combination with magnetic ballast (electronic ballasts produce flicker-free light). HMI bulbs (running with magnetic ballast) present an inherent problem of possibly producing light on film or video with a noticeable flicker. This is caused by the method by which the unit produces 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.
Temporal light artefacts (TLAs) are undesired effects in the visual perception of a human observer induced by temporal light modulations. Two well-known examples of such unwanted effects are flicker and stroboscopic effect. Flicker is a directly visible light modulation at relatively low frequencies (< 80 Hz) and small intensity modulation levels.
Sometimes, you may get a black, green or distorted screen while playing a video on AOL Video. The quality of the video clip you are watching depends on the following two factors:
Stroboscopic effect is one of the particular temporal light artefacts.In common lighting applications, the stroboscopic effect is an unwanted effect which may become visible if a person is looking at a moving or rotating object which is illuminated by a time-modulated light source.
Women in their 60s and 70s say this $27 eye cream 'works wonders'
Oaklynn Alexander can be heard asking again and again if she's "going to heaven today" in the background of a 911 call, at one point crying out "I don't want to!"
People reported seeing drones with flashing red, green and blue lights. Harwich Police Chief Kevin Considine spoke to WBZ-TV about how difficult it is for local departments to monitor drone sightings.