光线 + Verb/Adjective
光线 (guāngxiàn) is a noun meaning "light" or "ray," referring to visible light as a physical phenomenon. It is slightly more specific than 光 and often appears in descriptive or literary contexts. For example, 光线很暗 means "the light is dim."
这间屋子的光线不太好。
Zhè jiān wūzi de guāngxiàn bù tài hǎo.
The lighting in this room isn't very good.
早晨的光线特别柔和。
Zǎochén de guāngxiàn tèbié róuhé.
The morning light is especially soft.
光线太暗了,我看不清楚字。
Guāngxiàn tài àn le, wǒ kàn bù qīngchǔ zì.
The light is too dim; I can't read the words clearly.