Liter of Light

Litre Of Light
Type	Social enterprise, Interest group
Location	Manila, Philippines (global headquarters); Switzerland (European coordination); Colombia (South American coordination); Pakistan;
Services	Affordable and sustainable light
Key people	Illac Diaz (founder);
Website	www.aliteroflight.org

Liter of Light is an open source design for a low-cost light tube (or deck prism or vault light) that refracts solar light to provide daytime interior lighting for dwellings with thin roofs. Daylighting is cheaper than using indoor electric lights during the day. The device is simple: a transparent two-liter bottle is filled with water plus a little bleach to inhibit algal growth and fitted into a hole in a roof. The device functions like a deck prism: during daytime the water inside the bottle refracts sunlight, delivering about as much light as a 40–60 watt incandescent bulb to the interior. A properly installed solar bottle can last up to 5 years.^[1]^[2]

^ "10,000 Dirt Cheap and Life-Altering Plastic Lamps Installed in Manila Slums | Inhabitat - Sustainable Design Innovation, Eco Architecture, Green Building". Inhabitat. 29 July 2011. Retrieved 2012-10-04.
^ "Bringing light to the poor, one liter at a time | Video". Uk.reuters.com. Archived from the original on 2011-07-15. Retrieved 2012-10-04.

[Inhabitat-1] "10,000 Dirt Cheap and Life-Altering Plastic Lamps Installed in Manila Slums | Inhabitat - Sustainable Design Innovation, Eco Architecture, Green Building". Inhabitat. 29 July 2011. Retrieved 2012-10-04.

[2] "Bringing light to the poor, one liter at a time | Video". Uk.reuters.com. Archived from the original on 2011-07-15. Retrieved 2012-10-04.

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