Distribution evidence
Compare beam shape, cutoff and intensity where the application needs them.
IES / LDT resource center
GE Lighting Photometric Resources
Connect calculation files with the assumptions that make them useful: luminaire configuration, output package, optical distribution, mounting geometry and control state.
Resource principle
A file is useful when its configuration is understood
Photometric data supports comparison, calculation and documentation, but the filename alone does not establish suitability. Project teams should verify that the tested luminaire, lumen package, CCT, optic and driver correspond to the scheduled configuration. This center organizes the questions that belong beside an IES or LDT download.
“Traceable assumptions turn a photometric model into a specification tool.”
Use distribution plots to understand intensity direction, calculation output to study illuminance and uniformity, and product documentation to confirm electrical, dimensional and environmental constraints. For renovation work, record ceiling conditions and control interfaces before treating a nominal replacement as equivalent.
Resource sets for the project workflow
IES and LDT photometry
Match the file to the exact product family, optical code and lumen package. Review candela distribution and spacing implications instead of comparing fixture wattage alone.
Application calculation inputs
Document room geometry, reflectance, workplane, maintenance assumptions and obstruction conditions so calculation results remain interpretable during design review.
Color and visual-comfort context
Consider CCT, CRI, available TM-30 data, shielding and viewing angle alongside target illuminance. UGR is application and geometry dependent, not a universal fixture label.
Controls and electrical coordination
Verify driver protocol, dimming range, emergency interaction, sensor topology, surge requirements and commissioning ownership for the scheduled version.
Coordination resources
Keep dimensions, mounting and electrical interfaces connected to the model.
Field verification
Compare the commissioned space with the documented design assumptions.
Request the files behind your current selection.
Identify the product family, configuration and application so our team can route the relevant photometric and coordination resources.