Lamplight is the soft light that comes from a lamp — a table lamp, an oil lamp, or an old street lamp — not from the sun, and not from a hard, bare bulb. People choose this word when they care about the feel of the light: warm, a little yellow, often a bit dim, the kind you get in a quiet room at night. You will meet it more in stories than in everyday talk. “By lamplight” means you are reading or sitting with only a lamp on. A torch (the small hand light) does not usually give you lamplight; that word belongs to a lamp that stays in one place and makes a pool of light.

燈光；燈火（偏書面、有氣氛的說法）