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May 29, 2026Journal of Daylighting0 citationsOpen Access

Closed-Form Formulation for Lighting Design Objectives in Isotropic Light Source Rooms

Closed-Form Analytical Formulation of Lighting Design Objectives Procedure in Rooms With an Isotropic Light Source

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Authors

RMRizki A. MangkutoIHIkhwan Muttaqien HermawanTNTiara Nurhuda

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Overview

Randomized trial explores solid angle's role in achieving ambient illumination in rooms with isotropic light sources, highlighting precise design adjustments.

Key Points

  • This study aims to establish a systematic method for computing mean room surface exitance (MRSE) based on the characteristics of isotropic light sources.
  • Developed a closed-form analytical formulation for MRSE using lighting design objectives (LiDOs).
  • Conducted theoretical calculations verified against actual MRSE for different room scenarios.
  • Performed Monte Carlo simulations with 1000 random combinations to evaluate design outcomes.
  • The calculations consistently showed equality between specified and actual MRSE across various designs.
  • Achieved intended ambient illumination under the conditions of isotropic light sources.
  • Results indicated that precise computation of direct flux to surfaces enabled accurate design adjustments.

Cite This Study

Mangkuto et al. (2026) studied this question.

synapsesocial.com/papers/6a192c0ffab5b468c4415018https://doi.org/10.15627/jd.2026.16
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