[fā guāng]
（发出光来） give out light; shine; be luminous; brighten; fulgurate; flash; glow; sparkle; glisten; gleam; shimmer; radiate; lightening; radiation; shining; glowing; inflammation
give as much light as the heat can produce; do one's best, however little it may be
有一分热， 发一分光
Dewdrops sparkle [glisten] in the morning sun.
露珠在晨光下闪闪发光。
The stars twinkled.
群星闪闪发光。
[物] luminescence
electroluminescence
场致发光