It’s no brainer that white light provides better illumination than yellow, but in India (and around the world), all most every city municipal council installs yellow streets lights which ain’t 100% effective in providing proper road visibility.
So why do we have yellow/golden street lights?
Well, street lights are made of simple high-pressure sodium lamps which on passing electricity, gets excited and provide yellow illumination. Now these kinds of lamps provided maximum light, for the least amount of energy required. In short, municipalities save their electricity bills and compromise on visibility of road and pavement users.
However, with new LEDs getting more common and cheaper, Delhi government is planning to replace the depressing yellow street lights with LEDs and save further up to 700 crores on annual electricity bill of the capital city.
Image: skyscrapercity.com / tripadvisor.com
Cover Image: dailymail.co.uk
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