Reading Week: Considering the Brightness and Color Temperature of a Room That Makes Books Easy to Read

The two weeks starting October 27th mark "Reading Week." Coinciding with the long autumn nights, this is a time when people tend to pick up books more often.

If you're going to read, you'll want to adjust your room's lighting to suit your reading needs. This article outlines the ideal brightness and color temperature for comfortable reading.

目安 Ideal Brightness for Reading

According to JIS illuminance standards (JIS Z 9110), approximately 500 lux is recommended for tasks such as reading and studying. While the overall lighting in a living room for relaxation can be a bit more subdued, it's practical to brighten only the immediate area when reading.

Ideal Color Temperature for Reading

• Daytime / Intensive Reading: Daylight white (around 5000K) provides bright light that makes text stand out clearly.
• Nighttime / Relaxed Reading: Incandescent white (around 3000K) offers a calm, warm light.
• For Studying: Neutral white (around 4000K) strikes a balance, being neither too bright nor too dim.

Adjust with a Single Unit to Suit the Scene

The ideal lighting for reading varies depending on whether it's day or night, and whether you want to concentrate or relax. A dimmable and color-tunable ceiling light allows you to adjust the light to suit your reading needs at any given moment. For the relationship between readability and color rendering, please also refer to Autumn Night Reading Lights.

In the case of lipro

The Sunlight Ceiling Light supports color temperature adjustment from 3000K to 5000K and dimming from 0 to 100%. With a color rendering index of Ra97+, its "Study Mode" is neutral white at 4000K, ideal for studying. You can switch brightness and color temperature with the remote control to suit your reading scene.

Summary | Optimize Your Room's Lighting for Autumn Reading

A comfortable reading room comes from appropriate brightness and a color temperature suited to the scene. Why not take "Reading Week" as an opportunity to review your room's lighting?

Reference Information

• JIS Z 9110 (Illuminance Standard)
  Refer to Japanese Industrial Standards
• lipro "Sunlight Ceiling Light"
  https://jp.lipro.com/ja-jp/products/ceiling-light-ja