有一分热，发一分光 meaning in English
give as much light as the heat can produce -- do one's utmost
Examples
- Torch shines the sky , so i praise it ; candle gives out light , so i praise it too ; my paean is for you because you have hotness and emit light
火炬，光耀天庭，我赞扬；蜡烛，光照咫尺，我也称颂；我的赞歌献给你，因为你有一分热，发一分光。