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.
H.E. Williams 1/250W ED28 PS MH LAMP 17x17x10"SQ AREA LUMINAIRE
Polar Plot (2D)
Goniometer (3D)
Beam Analysis
Photometric Specifications
About this Photometric File
This page presents the IES photometric distribution for the 1/250W ED28 PS MH LAMP 17x17x10"SQ AREA LUMINAIRE from H.E. Williams.
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 1/250W ED28 PS MH LAMP 17x17x10"SQ AREA LUMINAIRE or any other H.E. Williams 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 H.E. Williams directly.