Do Stadium Lighting Specifiers Require LM-79, LM-80 and TM-21 Test Data?
When specifying LED stadium floodlights, buyers often ask whether LM-79, LM-80, and TM-21 test data are mandatory. The answer depends on the project specification, tender requirements, certification scheme, and local regulations. These reports are valuable technical evidence, but they should not automatically be treated as universal requirements for every stadium project.
UEFA's current stadium lighting guidance focuses on factors such as illuminance, uniformity, broadcasting performance, flicker, colour characteristics, reliability, maintenance, and environmental impact.
What Do LM-79, LM-80 and TM-21 Show?
The three standards address different aspects of LED performance.
- LM-79 evaluates the photometric and electrical performance of a complete LED lighting product.
- LM-80 measures lumen and colour maintenance of LED packages, arrays, or modules.
- TM-21 uses LM-80 data to project long-term lumen maintenance of LED light sources.
Therefore, an LM-80 report should not be confused with a complete floodlight performance test, and TM-21 is a projection method rather than a direct lifetime test of the entire luminaire.
Why LM-79 Can Matter for Stadium Projects
For sports lighting, actual luminaire performance is critical. Specifiers need reliable information about luminous flux, power consumption, efficacy, colour characteristics, and photometric distribution when creating lighting simulations.
The FORTOMO 41SL is available in 300W, 400W, and 500W , with approximately 45,000–75,000 lumens . It offers multiple beam angles from 7° to 45° , allowing lighting designers to select optics according to pole height and field geometry.
For a stadium project, the complete luminaire's photometric data is often more directly useful for lighting calculations than an LED chip report alone.
What About LM-80 and TM-21?
LM-80 and TM-21 can provide useful evidence when a project specification requires documented LED lumen maintenance and long-term performance .
However, the LED source is only one part of a stadium floodlight. Thermal management, driver performance, operating temperature, optical components, surge protection, and installation conditions can also affect the complete luminaire.
For this reason, professional buyers should evaluate the whole fixture , rather than selecting a product solely because it has an LM-80 or TM-21 document.
What Should Stadium Specifiers Request?
For international stadium projects, a practical technical documentation package may include:
- Complete luminaire photometric data
- Electrical specifications
- LED source information
- Lumen-maintenance documentation where required
- Driver specifications
- Thermal design information
- Flicker performance
- Colour characteristics
- IP/IK protection
- Surge protection
- Warranty information
UEFA's current requirements also place significant emphasis on maintained illuminance and regular verification of stadium floodlighting performance.
41SL for International Sports Lighting Projects
The 41SL combines high-output LED performance with flexible optics and control options including DALI, 0–10V, PWM, DMX512, and Synapse .
For global distributors, contractors, and stadium lighting designers, the appropriate testing and documentation should be selected according to the project tender, destination market, certification requirements, and lighting standard .
The key question is therefore not simply whether a supplier has LM-79, LM-80, or TM-21 data, but whether the available documentation provides the evidence required to verify the complete LED sports lighting system .