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    Design flexibility is ensured with high efficacy AccuRender

    Oct 8, 2020
    AccuRender flower photo
    Conventional wisdom is that increasing efficiency and saving energy is paramount; improving the environment, comfort, and wellbeing of the occupant is a distant second and can only be allowed provided energy efficiency goals are met. But this is flawed thinking, and outdated, soon to be irrelevant approach to building efficiency.

    More is demanded from the lighting designer. Lighting designs are challenged to meet visual requirements while supporting occupant wellness, providing a comfortable and engaging lighting experience, and delivering non-energy benefits of lighting such as task performance and facilitating collaboration …. and using responsible amounts of energy.


    The Department of Energy’s SSL R&D program, in response to this challenge, has introduced a new model characterizing the effectiveness, efficiency of a lighting system and efficacy of the application. Lighting Application Efficacy model is a framework of which framework provides designers of lighting systems and applications a tool to improve the way we differentiate lighting performance for a given application. 


    These are components of this framework:

    • Light Source Efficiency =Lumens/Watt
    • Optical Efficacy= A more effective delivery of the light generated by the source to the use in the application.  
    • Spectral efficiency = A more efficient delivery of light generated through spectral tuning to more effectively satisfy both visual and physiological requirements.
    • Intensity Control Effectiveness= A more efficient way of delivering lighting through dynamic control of light over time, including sensor control.


    Spectral efficiency


    Until now, the process of balancing tradeoffs to make an inflexible energy saving goal using only Lighting Power Density (LPD) as the metric often required compromises including sacrificing:


    Color quality preferences sacrificed to code and rebate efficacy requirements. Simply put, currently, specifying CRI 90 vs CRI 80 means sacrificing efficacy (typically around 20-25% lower efficacy for CRI 90) and and compromising on energy savings ​targets. Visual comfort sacrificed to rigidly adhering the uniform distribution of 300 lux at a horizontal task plane 30” AFF from the ceiling. Design flexibility sacrificed by the lack limited product choices and form factors available meeting energy, cost, and aesthetic requirements.


    These sacrifices are no longer necessary. With careful spectral engineering (and a little bit of color science magic) you can have it all. Design flexibility is ensured by offering the high efficacy AccuRender to meet your energy, cost, and aesthetic requirements. Starting with our iconic product families: ArcForm, EyeLine, ModiFly and TruGroove, we offer a range of design options for recessed, wall, suspended linear and configurable shapes.

    Modifly 2 Ledalite library
    • AccuRender can help a project team meet the lighting and power requirements and comply with the 2019 Building Energy Efficiency Standards, CA Title 24 Part 6
    • AccuRender with SpaceWise or POE also contributes to lighting control requirements in Section 130.1 and 130.2.
    • AccuRender and Ledalite’s meso optics contribute to meeting WELL Building Standard v2 Lighting Features LO3, LO7
    • AccuRender delivers circadian impactful lighting with CIE MDER value of .73 (Daylight =1.0) and MDEI (WELL v2) of .87(Daylight=1.) and EML (WELL v1)


    AccuRender accommodates color quality preferences, critical color rendering excellence CRI ≥ 90 and R9 ≥ 50. Meets Preference, Vividness, and  Fidelity criteria recommended  in  TM-30 Annex E. Visual comfort insured by no direct view of light source, distribution choices and UGR glare ratings <19 AccuRender’s design flexibility supports the ability of the design to satisfy visual, biological and behavioral lighting requirements, delivering additional value to the project.

    Graphic BL Ledalite AccuRender


    Meg Smith
    Meg Smith

    Post tags

    AccuRender, building efficiency, lighting designer, lighting designs, Lighting Application Efficacy model, lighting performance, light source efficiency, optical efficacy, Spectral efficiency, intensity control effectiveness, sensor control, Lighting Power Density, Design flexibility, ArcForm, ModiFly, EyeLine, TruGroove, recessed luminaires, wall , suspended linear, power requirements, lighting control requirements, WELL Building Standard

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