| 反光面 | fǎn guāng miàn | reflecting surface |
| 反射光 | fǎn shè guāng | to reflect light; reflection; reflected light |
| 司马光 | Sī mǎ Guāng | Sima Guang (1019-1086), politician and historian of Northern Song, author of Comprehensive Mirror for aid in Government 资治通鉴 |
| 喝光 | hē guāng | to drink up; to finish (a drink) |
| 单模光纤 | dān mó guāng xiān | single mode fiber |
| 单镜反光相机 | dān jìng fǎn guāng xiāng jī | single-lens reflex camera (SLR) |
| 回光反照 | huí guāng fǎn zhào | final radiance of setting sun; fig. dying flash (of lucidity or activity, prior to demise) |
| 回光返照 | huí guāng fǎn zhào | final radiance of setting sun; fig. dying flash (of lucidity or activity, prior to demise) |
| 回光镜 | huí guāng jìng | concave reflector (e.g. in spotlight) |
| 固体热容激光器 | gù tǐ rè róng jī guāng qì | solid state hot condensed laser (SSHCL) |
| 圆光 | yuán guāng | radiance emanating from the head; halo |
| 增光 | zēng guāng | to add luster; to add glory |
| 寿光 | Shòu guāng | Shouguang county level city in Weifang 潍坊, Shandong |
| 寿光市 | Shòu guāng shì | Shouguang county level city in Weifang 潍坊, Shandong |
| 多模光纤 | duō mó guāng xiān | multimode fiber |
| 夜光 | yè guāng | luminous |
| 大放光明 | dà fàng guāng míng | great release of light (idiom) |
| 太阳光 | tài yáng guāng | sunlight |
| 太阳光柱 | tài yáng guāng zhù | solar pillar; sun pillar (atmospheric optics) |
| 容光焕发 | róng guāng huàn fā | face glowing (idiom); looking radiant; all smiles |
| 寒光闪闪 | hán guāng shǎn shǎn | to glitter like frost and snow (idiom) |
| 审美眼光 | shěn měi yǎn guāng | an eye for beauty; aesthetic judgment |
| 寸金难买寸光阴 | cùn jīn nán mǎi cùn guāng yīn | An ounce of gold can't buy you an interval of time (common saying); Money can't buy you time.; Time is precious. |
| 屈光度 | qū guāng dù | diopter |
| 几何光学 | jǐ hé guāng xué | geometric optics |
| 弧光 | hú guāng | arc light |
| 张华光 | Zhāng Huá guāng | Zhang Huaguang (person name) |
| 强光 | qiáng guāng | glare |
| 徐光启 | Xú Guāng qǐ | Xu Guangqi (1562–1633), agricultural scientist, astronomer, and mathematician in the Ming dynasty |
| 微光 | wēi guāng | glimmer |
| 爱克斯光 | ài kè sī guāng | X-ray; Röntgen or Roentgen ray |
| 打光棍 | dǎ guāng gùn | to live as bachelor |
| 打耳光 | dǎ ěr guāng | to slap on the face; to box sb's ears |
| 摇光 | yáo guāng | eta Ursae Majoris in the Big Dipper |
| 支光 | zhī guāng | watt, unit of power used for electric bulbs |
| 放射性发光材料 | fàng shè xìng fā guāng cái liào | radiophosphor |
| 败光 | bài guāng | to squander one's fortune; to dissipate one's wealth |
| 散光 | sǎn guāng | astigmatism; see also 散光 |
| 散光 | sàn guāng | to diffuse light; see also 散光 |
| 旋光 | xuán guāng | rotation of plane of polarization of light |
| 日光浴 | rì guāng yù | sunbathing |
| 日光浴室 | rì guāng yù shì | sun room; solarium |
| 日光浴浴床 | rì guāng yù yù chuáng | sunbed |
| 日光节约时 | rì guāng jié yuē shí | daylight saving time |
| 日月重光 | rì yuè chóng guāng | the sun and moon shine once more; fig. things get back to normal after an upheaval |
| 明光 | Míng guāng | Mingguang county level city in Chuzhou 滁州, Anhui |
| 明光市 | Míng guāng shì | Mingguang county level city in Chuzhou 滁州, Anhui |
| 明光度 | míng guāng dù | luminosity |
| 明光蓝 | míng guāng lán | lavender blue |
| 春光明媚 | chūn guāng míng mèi | lovely spring sunshine |
