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About: Liter of Light     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatDevelopmentCharities, within Data Space : dbpedia.org associated with source document(s)

Type: Thingschema:Organizationdul:Agentdul:SocialPersonagentwikidata:Q24229398Organizationyago:WikicatOrganizationsBasedInManilayago:Abstraction100002137yago:Charity108406619yago:FinancialInstitution108054721yago:Foundation108406486yago:Group100031264yago:Institution108053576yago:Organization108008335yago:WikicatInternationalVolunteerOrganizationsyago:YagoLegalActoryago:YagoLegalActorGeoyago:YagoPermanentlyLocatedEntityorganisationyago:SocialGroup107950920yago:WikicatDevelopmentCharities New Facet based on Instances of this Class

Liter of Light is an open source design for a low-cost light tube 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.