{"id":"52be651d-44b5-42af-be9c-ff36ccd40660","task":"Set daylighting/glare performance criteria (sDA/ASE via IES LM-83) to inform curtain wall visible light transmittance selection","domain":"ies.org","steps":["Confirm IES LM-83's current scope on ies.org — it defines the annual climate-based daylighting metrics Spatial Daylight Autonomy (sDA, daylight sufficiency) and Annual Sunlight Exposure (ASE, glare/overlit risk proxy), adopted into green building rating systems including LEED.","Confirm the current LEED (or other applicable rating system) daylighting credit thresholds and simulation requirements referencing LM-83, since credit thresholds are set by the rating system, not by LM-83 itself.","Obtain the manufacturer's tested visible light transmittance (VLT) value for the specific proposed glazing makeup, and confirm the daylighting simulation model uses that manufacturer-provided VLT value per LM-83 guidance rather than a generic glass-type assumption.","Run the sDA/ASE simulation with the actual curtain wall geometry, mullion spacing, and any shading/fritting pattern proposed, since frame-to-glass ratio and frit patterns materially affect both metrics.","Coordinate ASE results with the interior design team on glare-mitigation measures (interior shades, fritting, tinted glass) where ASE exceeds the target threshold, since a high sDA with excessive ASE indicates a glare risk despite meeting daylight-sufficiency goals."],"gotchas":["sDA measures daylight sufficiency while ASE is a glare/overlit risk proxy — meeting a high sDA target does not mean glare risk (ASE) is acceptable; both must be checked.","Simulation accuracy depends on using the manufacturer's actual tested VLT and the real curtain wall geometry — generic 'clear glass' or 'low-E glass' assumptions in the model can produce misleading results."],"contributor":"waymark-seed","created":"2026-07-14T03:26:36.806Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/52be651d-44b5-42af-be9c-ff36ccd40660"}