A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices, and are increasingly used for lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet and infrared wavelengths, with very high brightness. (Source: Wikipedia, http://en.wikipedia.org/wiki/Light-emitting_diode)
The lights can be charged through the supplied 1.0 Watt solar panel. The Study Lights can also be charged from the mains using any of the popular mobile chargers (thick or thin-pin type). Ideally the time required to charge through the mains is 2-1/2 hours whereas it takes about 6 - 8 hours on a sunny day to fully charge the light using the solar charger. Solar bulk chargers are available for schools, where at a time 20 to 50 students can charge their lights. For more information please visit our 'How OneChildOneLight Study Lights can be charged in a school' page.
- In case of emergency (i.e., sunlight is not available for a long time) charge light using only a genuine Nokia mobile phone charger with matching pin. Never use other types of chargers as it will damage the light and void the warranty.
- A charge of 3 hrs is sufficient while using Nokia charger and irrespective of green indicator light showing. It can be disconnected after 3 hrs of charge.
Yes! Anyone can purchase one of the Study Lights for personal use, or as a gift to a deserving child or loved one. Whenever a study light is purchased for personal use, a certain percentage of the proceedings goes towards maintenance of this project.
If the charging is done using grid power from the mains, the study lights can be charged using any Mobile Charger with output 5.0V/350mA D.C or alternative good quality Ni-Mh Charger with output Voltage 5.0V, 275-350mA. For charging though Solar, 6V D.C, 1Wp Mono / Polycrystalline type panels can be used.
- The solar panel is made of mono/poly crystalline material, encapsulated behind glass, with an aluminum frame with a 3.5 mm connector.
- The solar panel generates approximately 5.5 volts and 114 mA current under bright sun light conditions.
- The solar panel is made to work for many years of daily use.