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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.

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Ansell Lighting(Ansell)••2 variants

Ansell Lighting ATRD- 1 (4W 4000K)

ATRD- 1 (4W 4000K) 80CRI

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Lumens
500lm
Peak Candela
141cd
Power
4W
CCT
4,000K
Beam Angle
126°

Polar Plot (2D)

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Goniometer (3D)

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Beam Analysis

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Photometric Specifications

Total Luminous Flux500 lm
Peak Intensity141 cd
Input Power4 W
Correlated Color Temperature4,000 K
Color Rendering Index80
Beam Angle (50% peak)126°
Symmetryfull
Lamp / SourceLED
CatalogATRD- 1 (4W 4000K) 80CRI
Open in CircadianLabDownload IES FileIES file via Ansell Lighting

About this Photometric File

This page presents the IES photometric distribution for the ATRD- 1 (4W 4000K) from Ansell Lighting, a Ansell brand. This product line is published as 2 variants — typically different CCT and CRI combinations of the same luminaire optic. Use the variant selector above to switch between them.

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 ATRD- 1 (4W 4000K) or any other Ansell 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 Ansell Lighting (Ansell) directly.

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