Men Examining CRT Tubes in Delhi (India)
In developing countries, old-style Cathodic Ray Tube (CRT) TV screens are still used, as they are much cheaper than modern flat-screen LCD displays. With cheap labor, CRT can be refurbished and re-used.
Those are refurbished CRT tubes near an Electronics market in Delhi.
For more info on CRT tubes, read en.wikipedia.org/wiki/Cathode_ray_tube.