Eulumdat

Eulumdat is a professional photometric data viewer for lighting engineers, designers, and
architects. View and analyze LDT (EULUMDAT) and IES photometric files with beautiful interactive
diagrams.

Features:
• Open and view LDT and IES photometric files
• Multiple diagram types: Polar, Cartesian, Butterfly, Heatmap, BUG Rating, and LCS
• Interactive 3D butterfly diagram visualization
• Export diagrams to SVG
• Convert between LDT and IES formats
• Batch conversion support
• Dark and light theme support
• QuickLook preview integration (macOS)

Perfect for:
• Lighting designers reviewing luminaire data
• Architects evaluating lighting fixtures
• Engineers analyzing photometric distributions
• Anyone working with lighting specification files Show More