IES/LDT Photometric Viewer

Engineer

Upload your own IES or LDT photometric file and preview its light distribution curve.

Photometric File (.ies / .ldt)

Supported scope: TILT=NONE for IES, Isym 0/1/2 symmetry types for LDT (EULUMDAT).

Select an IES or LDT file to preview its light distribution curve.

IES (IESNA LM-63) and LDT (EULUMDAT) files are the industry-standard formats describing a luminaire's measured light distribution (photometry) — the core input for lighting design software such as DIALux or Relux. This tool lets you upload your own photometric file and quickly preview its C0/C90 light distribution curve along with key values like flux per lamp and input wattage. It supports TILT=NONE (IES) and the common EULUMDAT symmetry types (Isym 0/1/2) only; complex tilt or symmetry scenarios require full photometric software.