Coverage Estimator

Architectural recessed downlight — most common Sage choice for corridor emergency egress.

• Phoenix — low-profile architectural emergency downlight in extruded aluminum. Recessed or surface mount. ~50 ft spacing at typical 9 ft ceiling.
• Est. egress path: ~1 fc avg (NFPA minimum: 1 fc avg / 0.1 fc min)

Aggregated across 1 zone. Compact crystal edge-lit exit sign with cam-lock aluminum surface mount — universal wall or ceiling application.

• Exit-sign count auto-derived from zone length. Specify an egress-door count to override with the actual door count from your floor plan. NFPA 101 requires exit signs at each exit and visible from all points along the egress path.

• Unit-equipment (BB) selected. Every fixture ships with integral battery. No central wiring needed, but per-fixture NFPA self-tests must be run manually.
• Worst-zone estimated egress path: ~1 fc average. NFPA minimum: 1 fc avg / 0.1 fc min.

The Coverage Estimator is a conversation-starter and scope-sizing reference. A real NFPA 101 / UL 924 compliant emergency design incorporates many inputs this tool does not accept. Before handing any output here to a stamped submittal, read the list below and engage Sage's engineering team with the project drawings.

• Exit-sign count is an approximation unless you override it
  The default exit-sign count auto-derives from zone length. Specify an egress-door count on each zone to override with the actual door count from your floor plan — that's the single highest-impact input you can give this tool. Doorway adjacencies and distance-to-exit still aren't modeled; NFPA 101 exit-sign placement depends on both.
• Ceiling-height compensation is linear, not full photometry
  When your ceiling exceeds a product's design mounting height, the estimator compresses spacing using an inverse-square approximation (effective spacing ≈ base spacing × base-ceiling / actual-ceiling) so fixture count actually responds to height. This keeps the scope-sizing output directionally right, but it's not a substitute for AGi32 / DIALux / Visual photometric modeling with the product's .ies file — that's the only way to verify egress footcandle compliance at any height.
• No defined egress path
  NFPA 101 requires 1 fc average / 0.1 fc minimum along the path of egress — not uniformly across the whole zone. This tool treats the zone as a rectangle; real egress paths wind around structure, equipment, and furniture.
• General-lighting integration not modeled
  When general-lighting fixtures host Sage Relay (SR-series) modules for emergency operation, the emergency layout depends on where the general-lighting fixtures already are — not on adding dedicated emergency units. This tool assumes dedicated emergency fixtures only.
• Obstructions are invisible
  HVAC equipment, structural members, warehouse racking, manufacturing equipment, partitions, and any other space-occupying element affect fixture placement and coverage. None of these inputs exist in this tool.
• Architecture-comparison output is illustrative, not quantitative
  The CB-vs-unit-equipment comparison (collapsed by default) uses internal index numbers, not dollars, and doesn't reflect real project costs. It conveys relative shape only. Expand it for rough orientation, never as a procurement input.
• Real designs require project drawings
  Any stamped emergency-lighting submittal requires the project's floor plans, RCPs, and full engineering review against NFPA 101 and UL 924. This tool reads only generic space-type inputs. Use the output as a scope-sizing reference, then click the Project Intake button above to send the summary + your project drawings to Sage engineering for the actual design.

Future directions — floor-plan / RCP ingestion, real photometric modeling, integration with the general-lighting plan, obstruction mapping — are on the Sage Beta roadmap. Feedback to winston@sageem.co is welcome.