She reflects the rays from the sun, the source of light and heat, the symbol of truth and knowledge.
而太阳才是光和热的源泉，是真理和知识的象征。
2
The sun is the only source of light and heat we need.
太阳是我们所需要的光能和热能的唯一源泉。
3
High quality light: no heat and radiation since there is no ultraviolet ray and infrared ray for the spectrum. It belongs to typical green lighting source.