Solar-powered flashlight: Difference between revisions
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== References == |
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Revision as of 14:00, 10 January 2012
 | It has been suggested that this article be merged into flashlight. (Discuss) Proposed since January 2012. |
Solar powered flashlights are flashlights powered by solar energy stored in rechargeable batteries. Most of these flashlights use light-emitting diodes lamps [1][2] since they have lower energy consumption compared to incandescent light bulbs. [3]
Eigenschaften
Solar powered flashlights vary in features and capabilities. A typical flashlight can give useful levels of illumination on objects up to 50 metres away, and beam may be visible for much longer distances. The colar cells used for battery charging have an indefinite life expectancy. A solar powered flashlihgt may give several hours of light after being charged during the day. [3] Flashlights may be designed to be impact resistant, weatherproof, and to float. [4] [5]
Other models include features such as a solar cell phone charger[6], an AM/FM radio, or a siren to call for help in an emergency. Some models include a hand crank dynamo for charging at night. [7]
An experimental solar flashlight the size of a credit card features a white LED powered by 16 solar cells. [8]
Advantages
- Solar powered lights need not be manually recharged as in the case of conventional battery operated flashlights.[3]
- Pollution from discarded batteries used in normal flashlights is eliminated.[4]
- Solar powered flashlights can be used in remote locations where it is impossible to find any source of electricity except for solar power.[4]
Significance
Solar powered flashlights have been distributed to countries where there is either no or erratic power supply, helping people feel safer leaving their homes at night, and giving children the opportunity to study after sunset.[9][10] A dual purpose solar flashlight, which also functions as a lamp has helped families in such countries spend more time together, surgeries to be performed during power outages and people to travel in the dark under a halo of light.[11][12][13]
See also
References
- ^ "LED Flashlight Torch". ledlights.org. Retrieved 2011-07-08.
- ^ "Solar LED Flashlight with 20-Lumen Brightness". flashlightnews.org. Retrieved 2011-07-08.
- ^ a b c "Solar Powered Flashlight". solarpoweredflashlight.org. Retrieved 2011-07-08.
- ^ a b c "How to Pick the Best Solar Powered Flashlight". solarpoweredflashlight.org. Retrieved 2011-07-08.
- ^ "Solar-Powered Flashlight". y2knorth.com. Retrieved 2011-07-08.
- ^ "Solar-powered torch and phone charger offered". ecoseed.org. Retrieved 2011-07-08.
- ^ "Survival Center's New Solar Powered Disaster Preparedness Flashlight/Radio". flashlightnews.org. Retrieved 2011-07-08.
- ^ "A torch to fit in your back pocket". rsc.org. Retrieved 2011-08-08.
- ^ "Lighting the world" (PDF). lighthaiti.org. Retrieved 2011-07-08.
- ^ "Wish List for the Rift Valley Children's Village". tanzanianchildrensfund.org. Retrieved 2011-07-08.
- ^ "Case study: SunNight solar" (PDF). m.rockfound.org. Retrieved 2011-07-08.
- ^ "Green Power - Business Plan" (PDF). edge.rit.edu. Retrieved 2011-07-08.
- ^ "Scaling for the Poor - The task of turning good ideas into greater good". edweb.sdsu.edu. Retrieved 2011-07-08.
