Liter of light
Liter of Light is a small light tube that can be made with simple means to direct light into rooms.
A piece of sheet metal and a water-filled plastic bottle serving as a light guide are used . The upper half of the bottle is attached to a hole in the ceiling so that it is illuminated by the sun outside the room. The refractive index of the water in the bottle then ensures that the sunlight is diverted directly downwards due to total reflection . For households that for various reasons do not have windows in their homes, but also for areas without power supply such as the corrugated iron huts in the poor areas of the Philippines, this is an inexpensive way to still illuminate their interiors.
The idea behind this principle goes back to the Brazilian mechanic Alfredo Moser, who in 2002 also filled the bottles with a little bleach to prevent the growth of algae in them. According to the electrical engineer Clivenor de Araujo Filho, this lighting should be able to generate the light intensity of a 40 to 60 watt light bulb without developing heat.
Web links
- uk.reuters.com , accessed November 30, 2012
- stern.de: A bottle of light goes around the world ( Memento from November 21, 2012 in the Internet Archive )
Individual evidence
- ^ A Liter of Light. In: UNFCCC . Retrieved February 21, 2016 .
- ↑ Gibby Zobel: Brasileiro inventor de 'luz engarrafada' tem ideia espalhada pelo mundo (The Brazilian inventor of "bottled light" has an idea that can be spread all over the world); BBC, August 13, 2013. Last accessed February 21, 2016.
- ↑ BusinessReport May / June 2012, p. 43 (PDF file; 4.55 MB) ( Memento from November 21, 2012 in the Internet Archive )