Flicker, lighting

Flickering lights High altitude Loud noises Strong smells Tobacco smoke Weather changes... 

Tyramine-containing foods Environmental triggers Glare or flickering lights High altitude Loud noises... 

Flame detectors alarm at the presence of light from flames usually in the ultraviolet or infared range. The detectors are set to detect the typical light flicker of a flame. They may be equipped with a time delay features to eliminate false alarms from transient flickering light sources. 

Thiamin trisphosphate accounts for a small proportion of the thiamin in the brain. The function of this compound is not clear, nor is it known if it plays a part in the neurological signs that occur with thiamin deficiency. Recent studies have shown that exposure of baboons to a flickering light can induce changes in brain levels of thiamin triphosphate. Flickering lights are often used in the study of convulsions, The work available on the compound is not extensive. 

Homonymous or bilateral visual symptoms including positive features (e.g., flickering lights, spot, lines) or negative features (e.g., loss of vision) or unilateral sensory symptoms including positive features (e.g., visual loss, pins and needles) or negative features (i.e., numbness), or any combination... 

Down by midnight. Next morning, faint flickering lights on looking out windows. 

In addition to the measnrement of emissions, screen flicker has also been fonnd to be a factor that canses real distress in some users I find it so myself. Approximately one in ten of the popnlation is believed to be photosensitive, that is, sensitive to flickering lights (Wilkins, 1990). These can canse headaches, visual strain, migraines, and in a small proportion of cases, trigger epileptic fits. Between five and twenty out of every 100,000 (Bentham, 1991, p. 93). The combination of fluorescent lighting and compnter screens can be particnlarly nnpleasant. I have known a number of students to complain of great discomfort when working with certain... 

A slow oxidation of phosphine can occur by a branched chain reaction, and, like the slow oxidation of white phosphorus, there appear to be critical pressure limits for the reaction. The faint flickering light sometimes seen in marshes, will-o-the-wisp , has been attributed to the spontaneous ignition of impure PHj, formed in the bioreduction of phosphate esters. Traces of phosphine have been detected in human faeces and in sewage sludges [14,15,15a]. It is sometimes evolved from fer-rophosphorus (Section 4.1). 

Sag A decrease in voltage up to 20 percent below the normal voltage, lasting less than 2.5 s. Also called undervoltage. Can result in memory loss, data errors, flickering lights, and equipment shutdown. 

Guignard, C., Vo Van Toi, Burckhardt, C.W. Schelling, J.L. (1983) Sensitivity To The Flickering Light In Digitalized Patients, British Journal in Clinical Pharmacology 15 189-196. 

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