太陽光と照明の科学
liproが発信する、光と暮らしの知識
Consider the total cost over 10 years of use | How to buy lighting beyond just the initial price
The cost of lighting isn't solely determined by the initial purchase price. When considering the "total cost over 10 years," which includes electricity bills and replacement eff...
Electricity Costs of LED Ceiling Lights | How Much Per Month? Estimates and Saving Tips
How much does it cost to power an LED ceiling light per month? We will explain how to estimate this...
Ceiling Light Price Ranges and Market Prices | What's the Difference Between Cheap and Expensive?
The price of ceiling lights varies widely, from a few thousand yen to tens of thousands of yen. We will...
From Fluorescent to LED Ceiling Lights | The 2027 Problem and Re-evaluating Your Choice
Under the Minamata Convention, the manufacture, import, and export of fluorescent lamps for general lighting will be abolished by 2027....
The "Darkness" of My Childhood Home I Notice When Visiting for Obon | How My Parents' Generation Sees Light and Brightness
Have you ever felt your parents' home seemed a little dim during a summer Obon visit? The amount of light...
Resetting Summer Sleep Debt | Preparing for Sleep on Late Summer Nights with Light
During the lingering summer heat, when restless nights continue, sleep debt tends to accumulate. We'll introduce tips for preparing for...
Customer Feedback | lipro Solar Sleep Light, a Review of Actual Usability
We've compiled reviews from people who have actually purchased and used the lipro solar sleep light, organized by theme. Here...