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2. Security lighting - Wikipedia

   en.wikipedia.org/wiki/Security_lighting

   Security lighting to prevent intrusions may be counter-productive. Turning off lights halved the number of thefts and burglary in Övertorneå Sweden. [2] [3] A test in West Sussex UK showed that adding all-night lighting in some areas made people there feel safer, although crime rates increased 55% in those areas compared to control areas and to the county as a whole.

3. Solar lamp - Wikipedia

   en.wikipedia.org/wiki/Solar_lamp

   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. Solar-powered household lighting can replace other light ...

4. Solar Garden Lights - Wikipedia

   en.wikipedia.org/wiki/Solar_Garden_Lights

   Solar lights may be found on the market in a variety of shapes, sizes, types, designs, and features to meet the needs and preferences of each consumer. Solar-powered landscape lighting does not require extra wiring or an electrical connection because it is fueled by the sun. This makes landscape lighting conceivable in remote areas of the ...

5. Street light - Wikipedia

   en.wikipedia.org/wiki/Street_light

   Detail of a street light from Paris Detail of a street light with Cupid, at the Austrian Parliament Building A wind powered street light in Urmia, Iran Many lamps have light-sensitive photocells that activate the lamp automatically when needed, at times when there is little-to-no ambient light, such as at dusk, dawn, or the onset of dark ...

6. Solar traffic light - Wikipedia

   en.wikipedia.org/wiki/Solar_traffic_light

   Solar-energy-powered traffic light. Solar traffic lights are signalling devices powered by solar panels positioned at road intersections, pedestrian crossings and other locations to control the flows of traffic. They assign the right of way to road users by the use of lights in standard colors (red - amber/yellow - green), using a universal ...

7. Twilight - Wikipedia

   en.wikipedia.org/wiki/Twilight

   Twilight occurs according to the solar elevation angle θ s, which is the position of the geometric center of the Sun relative to the horizon. There are three established and widely accepted subcategories of twilight: civil twilight (nearest the horizon), nautical twilight, and astronomical twilight (farthest from the horizon).