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A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.
Solight Design's co-founder, Alice Chun, is an architecture professor interested in solar-powered light. As explained in Chun's 2016 TEDx talk, [4] in dealing with her son's asthma –about 10% of children in New York have asthma [5] –Chun realized that poor air quality caused by pollutants was a growing problem, motivating Chun to find ways to incorporate solar power into daily living.
The original device consists of an inflatable LED lantern rechargeable by solar light. [13] [14] There are various models of Luci on the market today. Depending on the specific model, they generally take 7-25 hours of direct sunlight to charge [15] [16] and are able to provide 6-50 hours of light depending on the light mode and model [17] [18]
The light output of lanterns is quantified by lumens. Models around 100 lumens only provide enough light for personal use and ambient light; larger groups will want something in the 400 range.
The original light consisted of 18 lamps; with 14-inch (360 mm) reflectors, and was 112 feet (34 m) above sea level. It was visible in clear weather for a distance of 18 miles (29 km). In July 1851, Lt. David D. Porter, USN, reported as follows: "Hatteras light, the most important on our coast is, without doubt, the worst light in the world.
This lighthouse was constructed in 1904 and converted to unstaffed automatic acetylene gas operation in 1926. [2] The acetylene lighting installation, controlled by a sun valve, remained in use until the lighthouse was converted to a solar-powered (photovoltaic) system in 2013. [3]