光 (guāng) has multiple meanings including 'light,' 'to shine,' and 'bare' or 'used up.' As a verb or adjective, it can describe something being empty, bare, or stripped. Context determines whether it refers to light, bareness, or depletion.
冰箱里的东西都吃光了,得去买菜了。
Bīngxiāng lǐ de dōngxī dōu chī guāng le, děi qù mǎi cài le.
Everything in the fridge has been eaten up; we need to go grocery shopping.
太阳光照进房间,暖洋洋的。
Tàiyáng guāng zhào jìn fángjiān, nuǎnyángyáng de.
Sunlight shines into the room, warm and cozy.
钱花光了,这个月只能省着点了。
Qián huā guāng le, zhège yuè zhǐ néng shěng zhe diǎn le.
The money is all spent, so I can only be frugal this month.