CIE x050-PO161 PDF

In study two types, Direct Suspended Linear (DSL) and Direct and Indirect Suspended Linear (DISL) luminaires with dynamic height at daylight non access office proposed, to improve the Circadian Stimulus (CS) and Equivalent Melanopic Lux (EML) by focusing on working plane and occupants view direction. CS and EML measured in three height (H₁, H₂, H₃) scenarios. DSL shows: E_VH₁:523 lux, E_VH₂:520 lux, E_VH₃:550 lux and E_HH₁:2026.25 lux, E_HH₂:870 lux, E_HH₃:752.5 lux. Accordingly, CSH₁:0.3, CSH₂:0.3, CSH₃:0.31 and EMLH₁:340.473, EMLH₂:338.52, EMLH₃:358.05. DISL shows: E_VH₁:420 lux, E_VH₂:393 lux, E_VH₃:400 lux and E_HH₁:1137.5 lux, E_HH₂:520 lux, E_HH₃:521.5 and CSH₁:0.321, CSH₂:0.3, CSH₃:0.311 and EMLH₁:303.24, EMLH₂:283.746, EMLH₃:288.8. The Wilcoxon Signed Rank Test showed the impact of DSL and DISL luminaires on occupants' comfort criteria. Energy-efficient lighting, targeting a CS of 0.3, reduced power consumption by 40%. Data evaluation with 10 participants confirmed that beam distribution influenced power consumption, E_V, E_H, and occupant satisfaction (p-value: 0.006).