Domain L
Lighting
For lighting, the SRI does not measure the lamp but the control: does the light switch off when nobody is there, and does it dim with daylight. This is often the cheapest domain to score points in.
In short
- 1The Lighting domain does not assess the lamp itself, but rather the control system that operates the light.
- 2There are two smart-ready services: occupancy detection and daylight-dependent control of artificial light.
- 3This domain is often the most cost-effective way to achieve a higher class on the Smart Readiness Indicator.
Services in this domain
- Occupancy control for indoor lightingL-1a · 4 levels · A
- Control artificial lighting power based on daylight levelsL-2 · 5 levels
What does the Smart Readiness Indicator measure in lighting?
The Lighting domain within the Smart Readiness Indicator (SRI) does not measure the quality or energy consumption of the lamp itself. It measures the extent to which lighting automatically responds to its surroundings: to the presence of people and to available daylight.
This distinguishes the SRI from the energy performance certificate, which focuses primarily on the energy consumption of installations. The SRI assesses the "intelligence" of the control system: how much manual intervention is still needed, and how much happens automatically.
Which smart-ready services does this domain include?
The domain contains two smart-ready services. The first, L-1a, concerns occupancy control for indoor lighting. The lowest functionality level is a manual on/off switch. The highest level in this service is automatic detection, in which the light switches off automatically as soon as no one is present.
The second service, L-2, addresses the control of artificial light output based on daylight levels. This service has five functionality levels, ranging from manual central control to automatic dimming with scene-based light control. At this highest level, sensors automatically adjust light intensity and even colour temperature during fixed time intervals.
How are these services assessed?
Each smart-ready service is evaluated against seven impact criteria, such as energy efficiency and comfort. Three of these are classified as key functionalities and are weighted equally. The final score for the domain contributes to the building's overall SRI score, together with eight other domains.
Why is this domain relatively cost-effective to improve?
Occupancy sensors and daylight sensors are technically straightforward to install, compared with for example heating control or electric mobility. This means a building owner can make a significant jump to a higher functionality level with relatively limited investment.
For buildings that still rely entirely on manual switches, the transition to automatic detection often delivers the largest step forward in the SRI score within this domain.
Weight per building type
- Officeheavy
- Schoolheavy
- Care buildingmedium
- Hospitalmedium
- Hotelmedium
- Retail and supermarketheavy
- Logistics and distribution centreheavy
- Industry and manufacturingmedium
- Apartment buildinglight
- Municipal and public buildingsheavy
- Sports facilityheavy
- Data centrelight
Next step
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