Home > Technical Articles

What does 400 lux light mean?

Lux is a unit of measurement used to quantify the amount of visible light that illuminates a specific area. It measures the intensity of light, specifically how much light energy falls on a certain surface. In technical terms, one lux (lx) is equal to one lumen per square meter (lm/m²). Therefore, when we say 400 lux, we are referring to the level of brightness that 400 lumens of light generates over an area of one square meter.

The significance of 400 lux

The 400 lux level is often used as a standard for various lighting applications. Let's explore some contexts where this level of light intensity is relevant:

Interior Lighting

When it comes to interior lighting, 400 lux is commonly considered to be the minimum recommended level for general activities such as reading, writing, and computer work. This ensures adequate visual acuity and helps prevent eye strain, particularly in office spaces, schools, and libraries. Illumination below this level may compromise productivity and cause discomfort for people using the space.

Workplace Safety

In industrial settings, where safety is paramount, maintaining appropriate levels of lighting is crucial. A 400 lux requirement is often specified to ensure workers can properly see their surroundings and potential hazards. Industries such as manufacturing, construction, and warehouses necessitate well-lit areas to minimize accidents and enhance overall occupational health and safety.

Hospitality and Retail

In the hospitality and retail sectors, creating a pleasing and comfortable environment for customers is essential. A lighting level of 400 lux is typically employed to showcase products effectively and create an inviting atmosphere. Whether it's a restaurant, boutique, or showroom, proper lighting helps improve customer experience and influences their purchasing decisions.

In conclusion, 400 lux is a measure of light intensity important in various applications. From ensuring optimal productivity in workspaces to enhancing safety in industrial environments and creating appealing settings in the hospitality industry, this level of illumination plays a crucial role. Therefore, understanding the significance of 400 lux allows us to make informed decisions when it comes to lighting design and implementation.


Contact: Nina She

Phone: +86-13751010017

Tel: +86-755-33168386

Email: sales@china-gauges.com

Add: 1F Junfeng Building, Gongle, Xixiang, Baoan District, Shenzhen, Guangdong, China

Scan the qr codeClose
the qr code