Observing that the yellow glow must remain on Queen’s Necklace, the Bombay High Court on Friday allowed the use of yellow LED lights to be installed in place of the yellow sodium vapour lights along ...

City intersections with red-light “gotcha’’ cameras routinely cut short the time that motorists have to make it through yellow lights, running up the number of tickets issued and milking drivers ...

British scientists have developed sunlight-free greenhouses that could help boost food production in towns and cities. The next-generation houses use specific wavelengths of light to boost the growth, ...