[Recommended Article] Feasibility Analysis of Scene-Adaptive Luminous Efficacy Technology

With the continuous deepening of China's urban refined management, dual-carbon strategy, light pollution prevention and control, and smart lighting upgrade policies, the traditional mode of road and scene lighting characterized by "fixed luminous efficacy, uniform light distribution, and extensive control" can no longer meet the comprehensive requirements of modern cities for lighting safety, comfort, energy saving, and compliance. Fixed luminous efficacy lighting generally suffers from pain points such as uneven illuminance, strong glare interference, severe light pollution, high ineffective energy consumption, and high operation and maintenance costs, which are seriously out of step with current policy directions, standard upgrades, and market demands. In this context, scene-centered adaptive luminous efficacy technology has emerged.

This technology takes scene functional requirements as the core, treats luminous efficacy as a dynamic variable, and achieves precise "one scene, one luminous efficacy" lighting through scene modeling, precise optical design, and intelligent control linkage. It is an inevitable path to solve industry pain points and promote the high-quality development of the lighting industry, possessing strong practical necessity and promotion value.

The core logic of the adaptive luminous efficacy technology in this project is: luminous efficacy is a variable for the scene; an adaptive luminous efficacy model is established with the scene as the center to achieve one scene, one luminous efficacy.

1. Scene-centric design

Break through the traditional "luminaire parameters first" mindset, taking road width, functional zoning, pedestrian and vehicle flow, ambient luminance, glare limits, energy saving indicators, etc., as design inputs to form a scenario-based lighting requirement system.

2. Establish a multi-dimensional adaptive luminous efficacy model

Through optical simulation, parametric modeling, and algorithm optimization, we build adaptive lighting models covering multiple scenarios such as urban main roads, secondary roads, branch roads, industrial parks, squares, and tunnels, achieving precise matching of light distribution, illuminance, beam angles, glare control, and power output.

3. Precise Optics + Intelligent Control Loop

Adopting high-precision asymmetric light distribution and cut-off optical systems to reduce spill light and light pollution; combined with intelligent sensing and single-luminaire control technology, it achieves dynamic adaptive adjustment of luminous efficacy according to scenarios, time periods, and traffic flow, truly realizing on-demand, precise, and efficient lighting.

4. Conceptual Innovation

Upgrade from "lamp-centric" to "scenario-centric", defining luminous efficacy as a dynamic scenario variable, and reconstructing the underlying design logic of the industry.

5. Model Innovation

Establish a standardized, quantifiable, and replicable scenario-adaptive luminous efficacy model to solve industry challenges such as reliance on empirical design, coarse parameters, and poor adaptability in traditional lighting.

6. Application Innovation

Achieve one scenario with one luminous efficacy and one road section with one set of parameters, significantly reducing energy consumption and light pollution while improving lighting quality, promoting the leap of smart lighting from "getting bright" to "getting optimal".

7. Compliance Innovation

Fully aligns with national energy efficiency standards, light pollution control requirements, and dual-carbon policies, offering policy compliance and acceptance advantages, with significant technical barriers and strong industry leadership.

This technology fully complies with China's current and upcoming mandatory policies and standard systems:

8. Complies with the dual-carbon strategy and energy saving and consumption reduction policy requirements;

9. Complies with the mandatory provisions of the Ecological Environment Law regarding light pollution prevention and spill light control;

10. Complies with the latest energy efficiency standard GB 30255 "Minimum Energy Performance Standards for LED Road Lighting";

11. Complies with CJJ 45 "Standard for Lighting Design of Urban Roads" regarding requirements for illuminance, uniformity, and glare control;

12. Aligns with the policy directions of smart cities, new infrastructure, and refined urban management, providing strong support for project initiation, bidding, and acceptance.

13. Strong and certain market demand

The scale of retrofitting existing road lighting in cities nationwide, park lighting, and highway and tunnel lighting exceeds hundreds of billions, driven by policy and rigid demand upgrades. Luminous efficacy is the mainstream technical route for the next 3–5 years, offering broad market space.

14. Significant economic benefits

• Comprehensive energy saving rate can reach 30%–50%; • Significant reduction in light pollution and glare complaints, lowering operation and maintenance costs; • Extends luminaire service life, reducing total lifecycle investment; • Supports new business models such as Energy performance contracting (EMC) and Lighting as a Service (LaaS), offering substantial profit potential.

15. Prominent social and environmental benefits

Reduce light pollution, enhance traffic safety, lower urban energy consumption, and improve the residential lighting environment, demonstrating strong exemplary effect and promotion value.

16. Risk of Confusion in Industry Concepts

The market features hype around the pseudo-concept that "simple dimming equals adaptive luminous efficacy". Countermeasure: Uphold the fourfold technical barriers of model + optics + algorithms + measured data, and distinguish genuine from fake technologies using test reports, simulation data, and compliance certification.

17. Risk of Insufficient Awareness Popularization

Some property owners have a limited understanding of technical value. Countermeasure: Use policy compliance, energy saving benefits, and acceptance advantages as entry points to strengthen scenario-based comparative demonstrations.

18. Risks in Technology Implementation

Countermeasure: Adopt modular and standardized designs compatible with existing smart lighting control systems, featuring simple construction, low retrofit costs, and rapid scalability.

The essence of lighting lies in the scenario; the soul of luminous efficacy lies in adaptation. For a long time, China's lighting industry has been trapped in an inertial mindset focused solely on parameters, indicators, and laboratory data: evaluating quality by lumens per watt, defining energy saving by fixed luminous efficacy, and judging merit by paper values. The entire industry treats the luminaire as the center and the scenario as a supporting role; it treats parameters as truth and actual effectiveness as secondary. This has led to an absurd yet real situation: luminaires with high laboratory luminous efficacy cause glare, severe light pollution, and high ineffective energy consumption in actual scenarios; while truly scenario-fit, demand-based, and precisely controlled adaptive luminous efficacy is marginalized, misunderstood, or even eliminated in reviews, certification, and bidding due to inferior laboratory indicators.

What is more thought-provoking is that such a core, essential concept closely aligned with engineering reality—"Luminous efficacy is a variable for the scene, scene-centric, one scene one luminous efficacy"—was not proposed by industry giants or authoritative institutions, but by small and medium-sized enterprises deeply rooted in the frontline and directly facing pain points. This is not the luck of innovators, but a wake-up call for the industry; it is not a dark horse's comeback, but the inevitable result of the entire industry's long-term neglect of scenes, detachment from reality, and involution over parameters.

We must clearly recognize: lighting is not a solo performance by the luminaire, but an art of adapting to the scene. Luminous efficacy is not a fixed constant, but a variable that dynamically changes with scene functions, environmental conditions, and usage requirements. Discussing luminous efficacy without considering the scene is empty talk; discussing energy saving without considering actual effectiveness is pseudo energy saving; discussing intelligence without considering needs is fake smartness. The current lag in the industry evaluation system has become an obstacle to technological innovation: testing only recognizes paper metrics, certification only looks at laboratory data, and reviews only trust fixed parameters, resulting in scene-based technologies that truly solve light pollution, improve safety, and achieve real energy saving failing to receive fair recognition. This is a misalignment in the industry, a lag in standards, and a challenge that all practitioners need to face together.

The proposal of the adaptive luminous efficacy scene theory is precisely to correct this deviation: return to the essence of lighting, return to the scene center, and return to practical value. We advocate: determine luminous efficacy by the scene, determine light distribution by requirements, and judge merits by actual effectiveness. Let every beam of light be used where it should be; let every unit of energy consumption produce real value; let every scene have its exclusive light environment.

Small enterprises propose big ideas, not to challenge anyone, but to awaken the industry: innovation lies not in scale, but in whether it returns to the essence; advancement lies not in parameter levels, but in whether it solves pain points; the future lies not in involution of existing stock, but in reconstructing value logic. Adaptive luminous efficacy is not a concept, not hype, not a gimmick. It is policy orientation, standard trend, market rigid demand, and technological inevitability. It represents the historical upgrade of the lighting industry from "lamp-centric" to "scene-centric". We firmly believe: future lighting will definitely be scene lighting; future luminous efficacy will definitely be adaptive luminous efficacy; future evaluation will definitely be effectiveness-based evaluation.

May the industry no longer be trapped by parameters, may technology no longer be burdened by certification, may every true innovation be treated fairly; may every city have a healthy, comfortable, adaptive, high-quality light environment.

—Dedicated to all lighting professionals who return to the essence;

This article is dedicated to this year’s International Dark Sky Week!

Shanghai Yi Yong Optoelectronics Technology Co., Ltd.