[fā guāng]
（發出光來） 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
有一分熱， 發一分光
Dewdrops sparkle [glisten] in the morning sun.
露珠在晨光下閃閃發光。
The stars twinkled.
群星閃閃發光。
[物] luminescence
electroluminescence
場致發光