Light Well: Light Dug Up from the Earth

A light well penetrating a green roof. The cross-section of the well is an irregular circle or ellipse, with a continuous curved fair-faced concrete inner wall that gradually widens from a small opening at the top downwards. Light enters and reflects off the funnel-shaped inner wall, becoming soft, diffused light by the time it reaches the interior, leaving only a bright spot on the floor at the bottom of the well. The sky is not visible from indoors; only the light is seen. Avoid: making the light well a square vertical shaft, having the top and bottom openings the same size thus losing the funnel effect, adding grilles or decorations inside the well, allowing the sky to be directly visible from indoors, which would weaken the sense of mystery.

Translated from Chinese by AI.

一個從覆土屋頂穿下來的光井。井的斷面是不規則的圓或橢圓,內壁是連續的清水混凝土曲面,從上方的小開口往下逐漸擴大;光進來之後在漏斗形的內壁上反射,到達室內時已經變成柔和的漫射光,只在井底的地面留下一塊亮斑。室內看不到天空,只看到光。避免:把光井做成方正的垂直管道、讓上下開口一樣大失去漏斗效果、在井內加裝格柵與裝飾、讓室內可以直接看到天空削弱神秘感。