Bookstore Spine Lighting: Vertical Illuminance Determines Findability

A bookstore's bookshelf area, where light fixtures are positioned on the aisle ceiling, angled towards the bookshelves. The light primarily illuminates the vertical surfaces of the bookshelves, rather than the aisle floor. As a result, the spines of books on every shelf are uniformly lit, making titles and authors' names easily readable from a standing position in the aisle, without needing to get close or bend down. The brightness of the upper and lower shelves is similar, with no top-bright, bottom-dark disparity. The other side of the image shows a contrasting incorrect setup: lights only illuminate the aisle floor, leaving the vertical surfaces of the bookshelves dim, especially the lower shelves where titles are almost unreadable, requiring people to squat down and use their phones for light. Both bookshelves are identical. Avoid: depicting the two setups as identical, showing significant top-to-bottom brightness differences on the bookshelves, using low color rendering that distorts book cover colors, illuminating the floor brighter than the bookshelves.

Translated from Chinese by AI.

一間書店的書架區,燈具設在走道天花偏向書架的位置,光主要打在書架的垂直面上,而不是走道的地面。因此每一層的書背都被均勻照亮,書名與作者的文字從走道站立的位置就能輕鬆讀取,不需要靠近或彎腰。書架的上層與下層亮度接近,沒有頂亮底暗的落差。畫面另一側以錯誤配置對照:燈只照走道地面,書架的垂直面偏暗,尤其下層幾乎看不清書名,人必須蹲下並拿手機照。兩者的書架完全相同。避免:把兩種配置畫成一樣、讓書架出現明顯的上下亮度差、使用低演色性讓書封顏色失真、把地面照得比書架亮。