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Reading Leaf / bookmark for reading

Reading Leaf
Reading Leaf

We know that to keep suitable brightness can protect our eyesight.
But what is the range of the comfortable illuminance ?

The reading leaf is the bookmarker that
it can change the color with the illuminance.

University

Shin Chien University

Shin Chien University
Taipei, Taiwan

Design

Wan-chung,Lien

Wan-chung,Lien
Taipei, Taiwan