lamp
light source
[C] Countable
pl: lamps
This term evokes a sense of focused, localized illumination rather than the general brightness of a room. It suggests a portable or stationary object designed to carve a circle of light out of the darkness, often associated with study, reading, or bedside comfort.
While a light can be any source of luminosity, a lamp is specifically a piece of equipment. In a cultural context, it often carries connotations of intellectual pursuit or late-night labor, as seen in the imagery of a student working by a lamp.
Countable because it refers to a distinct, physical object you can buy, move, or turn on.