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Liter of Light began in Mexico in early 2013, sponsored by Qohélet A.C. [35] Founded by Tere Gonzalez, who had previously worked with Liter of Light in India & Spain, the group began operations with a pilot program in the state of Chihuahua México, where they were able to benefit 114 people. As of September 2013, they are working to complete ...
Cross-section schematic of a Liter of Light solar bottle by CMG Lee. Blue: Bottle with water and bleach, Green: Glue, Purple: Steel plate with hole. Width: 100%:
Alfredo Moser (* 1951 in Itajaí) is a Brazilian mechanic, and the inventor of the solar bottle bulb, known also as the ‘Moser Lamp’, or the PET bottle lamp. [1] [2] His invention led to the creation of the open-source organization Liter of Light, which offers sustainable lighting to families without electricity access in numerous countries worldwide.
The human eye's response to light is non-linear: halving the light level does not halve the perceived brightness of a space, it makes it look only slightly dimmer. [3] [4] If light is redistributed from the brightest parts of a room to the dimmest, the room therefore appears brighter overall, and more space can be given a useful and comfortable level of illumination (see before and after ...
A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter. The lamp operates on electricity from batteries , charged through the use of a solar photovoltaic panel.
The transmitted light varies over the day; should this not be desired, light tubes can be combined with artificial light in a hybrid set-up. [ 27 ] [ 44 ] [ 45 ] [ 46 ] Some artificial light sources are marketed which have a spectrum similar to that of sunlight, at least in the human visible spectrum range, [ 47 ] [ 48 ] [ 49 ] as well as low ...
The template will display a "(Compare)" link (as above). However, the link will point to the corresponding radiometry table in the separate article on "Radiometry", not to within the article, where the {{SI light units}} template has been included. This is useful, if the other table should not be included in the article.
The luminance of a specified point of a light source, in a specified direction, is defined by the mixed partial derivative = where L v is the luminance ( cd / m 2 ); d 2 Φ v is the luminous flux ( lm ) leaving the area dΣ in any direction contained inside the solid angle dΩ Σ ;