Light-emitting-diode bulbs are becoming a new tool for customizing home or office lighting environments.
In November last year, Naomi Watanabe, who teaches at an elementary school in the evenings, installed a Panasonic Corp. LED ceiling light system in her classroom at a private home in Yokohama.
"This has made the texts look sharper and easier for students to read and helped stop them from falling asleep during my class," Watanabe said.