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The device is a small, head-mounted device which measures an individual's daily rest and activity patterns, as well as exposure to circadian light—short-wavelength light, particularly natural light from the blue sky—that stimulates the circadian system.
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.
This neck reading light is a great gift for those who have evening hobbies where they need a little bit of extra light, like knitting, cross-stitching, reading or even camping. Save $14 with Prime ...
Head-mounted displays can filter the signal electronically and then transmit light directly into the viewer's eyes. Anaglyph and polarized glasses are distributed to audiences at 3D movies . Polarized and active shutter glasses are used with many home theaters.
The small, head-mounted device measures an individual's daily rest and activity patterns, as well as exposure to short-wavelength light that stimulates the circadian system. The device measures activity and light together at regular time intervals and electronically stores and logs its operating temperature. The Daysimeter can gather data for ...
Weapon mounted lights 200 and above Bicycle headlamps Light use depends on speed, quality of trail, surrounding light 1000 and up High powered Outdoors, search and rescue, caving, night orienteering, high-speed bicycle use, night mountain biking, diving
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