Lumen Lab
Photometric · IES · 3D preview
Lumen Lab, Lumen Aid, and Save-On-Energy — design tools and midstream savings in one place.
Lumen Efficient Design
Design-oriented photometric planning with shared IES workflow — interior and exterior modes, 3D previews, and optional catalog fixtures.
No IES loaded.
Lumen method + symmetric grid assumption (good for budgeting; verify critical tasks separately).
Drag to orbit, right-click to pan, mouse wheel to zoom.
Lumen Efficient Design
Transparent operating cost modeling across existing vs new scenarios — energy, relamping, ballasts, tariffs, and maintenance labor.
Log in to save audits, reload them, create share links, and use Report PDF (same idea as Lumen Lab jobs).
Add one block per space or scenario. Each block pairs Existing and New side by side (same area name in both columns) and has its own lamp/fixture inputs. Site schedule, tariffs, labor, and fixture counts are set separately for Existing vs New (retrofits often change inventory). Lamp material and disposal scale with lamps per fixture; relamp labor is per fixture service event (each relamped fixture once).
Roll-up of every area’s Existing vs New inputs. Per-area detail appears below the totals.
Length / Width / Height: Room dimensions.
Workplane height: Task plane above floor (desk/surface height).
Target illuminance: Desired average light level (Lux or fc).
Lumens per fixture: Rated lumens from selected luminaire.
Reflectances: Ceiling/wall/floor surface reflectivity used to estimate CU.
CU: Coefficient of Utilization, estimated here from RCR and reflectances.
LLF: Light Loss Factor for maintenance/depreciation effects.
RCR: Room Cavity Ratio, based on room shape and cavity height.
Fixture layout: The required count rounds up from the lumen method so the area-average usually meets your target. The 3D ceiling pattern is a symmetric, centered grid (partial rows are not stacked on one side of a corridor). Spacing shows the geometric pitch between grid lines. Est. avg illuminance and Target shortfall summarize the simple uniform-field assumption.
Site length / width: The lit footprint of your outdoor zone.
Mounting height: Pole or fixture mounting elevation above grade.
Pole setback: Distance in from the site edge used in layout placement.
Maintenance factor: Exterior equivalent to LLF for lumen depreciation and dirt losses.
Advanced mode: Uses spacing, beam, and downlight behavior to approximate min/avg and uniformity.
Uniformity: Reported as Avg/Min; lower values are generally more uniform.
Pole positions: The preview uses a symmetric grid centered inside the setback footprint (not edge-hugging partial rows along one side). Target shortfall compares area-average result to your maintained target.
Typical maintained targets (general design guidance; project and code requirements vary by jurisdiction).
Use these as planning defaults when exact finish data is not available.