Professional photometric calculations and light study tools. Free, browser-based, no installation required.
Photom is a growing suite of focused tools — each one built to do one thing exceptionally well.
Point-by-point photometric calculations for interior spaces. Upload any IES file, configure your room, and get a full footcandle layout instantly.
Photometric calculations for exterior applications — parking lots, roadways, sports fields, and more. Includes BUG rating analysis and outdoor lighting standards.
Draw custom room shapes and outdoor scenes, place fixtures manually, and export directly into InCalc or OutCalc for full photometric analysis.
Drag in any manufacturer IES file. Photom parses the candela distribution, lumens, wattage, and symmetry type automatically.
Enter dimensions, mounting height, and select a space type. IES standard targets for workplane height and footcandle requirements pre-fill automatically.
The suggestion engine finds the most efficient fixture grid that meets your target. Or set rows and columns manually and see results instantly.
Add project name, date, and your name. Print a professional site plan report with fixture schedule, photometric stats, and annotated views.
No licences, no installs, no learning curve. Just open a browser and start working.
Runs entirely in the browser. No download, no account, no installation. Open the URL and start calculating.
Calculations use your actual fixture photometric files — not generic approximations. Supports symmetric, asymmetric, and multi-lamp fixtures.
Space type presets reference IESNA RP-1, RP-2, RP-3, RP-6, RP-7, and RP-29. Workplane heights and fc targets follow the relevant standard.
Tell the tool your target footcandle level. It finds the most efficient fixture layout that meets it, accounting for room geometry and uniformity.
Export a professional site plan report with project metadata, fixture summary, photometric stats, and annotated 3D and plan views.
Photom tools are free to use. No subscription, no usage limits, no paywall. Professional-grade tools should be accessible to everyone.
Upload an IES file and see your first footcandle layout in under a minute.