Use this fixture in a lighting design
Open in CircadianLab to place this fixture in a room and calculate melanopic lux (EML), illuminance, UGR glare, and WELL v2 compliance — with radiosity simulation and real IES photometry. Free, no signup.
Lithonia Lighting Downlight / LDN4 Square Series — LDN4SQ_40_15_LW4_BR
LDN4SQ 40/15 LW4 BR
Polar Plot (2D)
Goniometer (3D)
Beam Analysis
Photometric Specifications
About this Photometric File
This page presents the IES photometric distribution for the Downlight / LDN4 Square Series — LDN4SQ_40_15_LW4_BR from Lithonia Lighting, a Acuity Brands brand.
You can use this fixture in CircadianLab to design lighting layouts and calculate melanopic equivalent lux (EML), illuminance in lux or foot-candles, and UGR glare ratings — all in your browser, free, with no signup required.
Note on photometric plots: All plots on this page treat the luminaire as a point source emitting from its photometric center, which is the standard convention for IES LM-63 data.
Disclaimer: Innerscene does not manufacture, sell, or distribute the Downlight / LDN4 Square Series — LDN4SQ_40_15_LW4_BR or any other Lithonia Lighting products. This page is provided for informational and lighting-design purposes only, using publicly available photometric data. For product inquiries, pricing, or availability, please contact Lithonia Lighting (Acuity Brands) directly.