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SmartArch Lighting / Daylight / Material Reflection Calculator
Term note: E_avg is maintained illuminance; U0 and UGR should be read with BS EN 12464-1/CIBSE context. DF, sDA, ASE and DGP are daylight design indicators. Material ρ, solar reflectance and gloss flag façade/neighbour/highway glare risk.
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Not planning permission, building regulations approval or building control sign-off.
Local code / standard reference — Missing
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Term note: E_avg is maintained illuminance; U0 and UGR should be read with BS EN 12464-1/CIBSE context. DF, sDA, ASE and DGP are daylight design indicators. Material ρ, solar reflectance and gloss flag façade/neighbour/highway glare risk.
Formulas: E_avg=(N×Φ×CU×MF)/A; U0=E_min/E_avg; DF=Ei/Eo×100; ρ_avg=Σ(Aᵢ×ρᵢ)/ΣAᵢ; ρ+τ+α=1; R=D−2(D·N)N.
Daylight values are preliminary indicators; full EN 17037 / climate-based compliance requires project-specific simulation and expert review.
Formulas: E_avg=(N×Φ×CU×MF)/A; U0=E_min/E_avg; DF=Ei/Eo×100; ρ_avg=Σ(Aᵢ×ρᵢ)/ΣAᵢ; ρ+τ+α=1; R=D−2(D·N)N.
Daylight values are preliminary indicators; full EN 17037 / climate-based compliance requires project-specific simulation and expert review.
