Lighting requirements for indoor spaces: Understanding the latest changes in EN12464-1

The primary reason for updating the EN12464-1 standard was to align it with the latest research on lighting, well-being, and productivity. The revised standard emphasizes not only how well we see but also the role of lighting in influencing mood and alertness, making it more relevant to today’s work environments.

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Key changes in the new version

1. Improved visibility and lighting levels

One of the key updates is the increased emphasis on lighting levels for walls, ceilings, and vertical surfaces - areas that were not as clearly addressed in previous versions. The new version highlights their importance in creating well-lit environments that enhance focus and recognition.

• Wall illuminance: Recommended levels have been increased to 75-150 lux, depending on the space and activities involved.
• Ceiling illuminance: Ceiling lighting has been raised to 50-100 lux, improving the overall brightness of the space.
• Cylindrical illuminance: Vertical lighting, also called cylindrical illuminance, has been updated to 150-300 lux to improve communication and object recognition. By increasing wall and ceiling illuminance, designers can reduce contrast and enhance well-being.

2. Flexible light levels with context modifiers

The updated standard is more flexible, allowing adjustments to light levels based on user needs. These are referred to as ‘context modifiers’. For instance, if a worker’s eyesight requires additional support or if the task demands higher precision, lighting levels can be adjusted accordingly. Context modifiers determine the increase of light levels by one or two steps, such as raising lighting from 500 lux to 750 lux for workers over 50 or for tasks requiring fine visual detail. It is recommended to offer this flexibility via lighting controls, as these context modifiers might require light level changes over time with changes in the usage of a space or the people who work there.

3. Classroom lighting

The revised standard also introduces changes to lighting levels for specific applications. Notably, all classrooms now require a uniform lighting level of 500 lux, instead of the previous distinction between adult evening classes (500 lux) and standard classrooms (300 lux). Lighting should be controllable, allowing for dimming to 300 lux for young children.

4. Human-Centric Lighting (HCL)

Another significant update is the emphasis on Human-Centric Lighting (HCL). A new annex provides guidance on how lighting influences both visual and non-visual aspects of well-being, including mood, sleep, and cognitive function - not just visibility for tasks.

5. Technical clarifications

The new version also includes clearer guidelines for reducing glare, as well as addressing flicker and stroboscopic effects in Annex B. These clarifications ensure that lighting systems do not cause discomfort or health issues.

How will these changes impact lighting design?

The revised standard provides lighting designers with better tools to create high-quality lighting environments. By emphasizing both vertical and ambient light, designers can ensure that spaces are optimized for tasks and contribute to well-being and improved communication. This is especially valuable in offices, schools, healthcare facilities, and industrial workplaces, where good lighting is key to productivity and comfort.

What does this mean for you?

If you are involved in lighting design, interior architecture, or facilities management - or if you want to ensure your users have the lighting they need - understanding the new EN12464-1 requirements is crucial. The updated guidelines help ensure that your projects meet more than just basic lighting needs; they also contribute to the well-being and productivity of those using the space. With the focus on Human-Centric Lighting and adaptable light levels, you can provide tailored solutions for each environment.

At ETAP, we are here to help you navigate these changes. By staying informed about the updates, you can make more effective choices in your lighting projects and create spaces that benefit from well-designed indoor lighting. We offer services that fully unburden you with guaranteed lighting performance in line with all norms - not only on day one but for decades to come.

Questions?

If you’d like to know more about how these changes affect your lighting projects or explore solutions tailored to your needs, don’t hesitate to reach out. We’re here to support you in your journey toward smarter, more user-friendly, and circular lighting solutions.