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Providing light early in the evening can help seniors sleep better at night and be more alert during the day because the light delays the biological, circadian clock. [13] Many studies have shown that when the elderly are exposed to bright white light, the elderly individual saw improved sleep efficiency.
Headlamp attached to a helmet. A headlamp, headlight, or head torch is a light source affixed to the head typically for outdoor activities at night or in dark conditions such as caving, orienteering, hiking, skiing, backpacking, camping, mountaineering or mountain biking. Headlamps may also be used in adventure races.
Metal-halide and ceramic metal-halide lamps can be made to give off neutral white light useful for applications where normal color appearance is critical, such as TV and movie production, indoor or nighttime sports games, automotive headlamps, and aquarium lighting. Low-pressure sodium-vapor lamps are extremely efficient.
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At high peak currents, very bright green-blue. Used in flashlamp, xenon HID headlamps, and xenon arc lamps. Nitrogen: Similar to argon but duller, more pink; at high peak currents bright blue-white. used in the Moore lamp (historically) Oxygen: Violet to lavender, dimmer than argon: Hydrogen: Lavender at low currents, pink to magenta over 10 mA ...
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