U23I1R1/WLDT1

U23 is a recessed diffuser flatpanel
lacquered sheet steel
LED • 3000 K • CRI (Ra) 80
diffuser • acrylic (PMMA) microprism with diffuser foil • wide-angle
<= 19
3300 lm
114 lm/W
90% @ 50khrs (Tq=25°C)

CRI 90

Most of our products are also available in CRI (Ra) 90.

Please contact our sales department for more information

LLMF

The figure that reflects the drop in luminous flux of the light source (LLMF) takes into account failing LEDs, and deterioration of the light output over time. How do we determine this LLMF? We distinguish between the service life of LEDs at the component level and at the luminaire level.

At the component level we take into account the gradual deterioration of the luminous flux of the LEDs (parametric failure or B-lifetime), and the potential breakdown of LEDs (catastrophic failure or C-lifetime). At the luminaire level the complete failure of a luminaire is not relevant (see Luminaire Survival Factor). The LLMF corresponds with the B-lifetime at the luminaire level and hence takes on board the parametric as well as catastrophic failure of the individual LEDs in the luminaires.

In order to achieve an accurate, reliable LLMF for our luminaires, we carry out a ‘principal component analysis’:

  • We determine the parametric failure at the component level in accordance with objective LM80/TM21.
  • We are unable to calculate the catastrophic failure, but prefer to collaborate with manufacturers who make accurate data available. Whenever no measurement data are offered, we depend on electronic reliability models (MIL-HBK-217F)

UGR

Unified Glare Rating

This is an approximate model expressing the risk of glare.

The standard values range from UGR 16 (low risk of glare) to UGR 28.
In the standard for workplace lighting EN12464-1, limit values for UGR are imposed for various rooms.

Unified Glare Rating

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Tender description

U23I1R1/WLDT1 U23 is a recessed diffuser flatpanel Diffuser optics, acrylic (PMMA) microprism with diffuser foil, wide-angle light distribution. Low recessed height. Dimensions: 1195 mm x 295 mm x 25 mm. M300, installation as pure lay-in luminaire for modular ceilings with basic exposed tee grid system. Flat panel diffuser for bright and uniform illumination. Luminous flux: 3300 lm, Luminous efficacy: 114 lm/W. Power: 29.0 W, DALI dimmable. Frequency: 50-60Hz AC/DC. Voltage: 220-240V. Electrical isolation class: class II. LED with very good light maintenance; at 50000 hrs the luminaire retains 90% of it's initial flux (Tq=25°C). Correlated colour temperature: 3000 K, Colour rendering ra: 80. Colour consistency (McAdam ellipse): ≤ 3 SDCM. Photobiological safety IEC/TR 62778: RG0. Lacquered sheet steel housing, RAL9016 - traffic white (textured). IP protection level: IP20. IK protection level: IK03. IP from below: IP44 from below. Non-replaceable light source. Replaceable control gear by a professional. Energy efficiency class of the light source according to EU regulation 2019/2015: C. Ambient temperature: -20°C - 35°C. Glowwire: 650°C. 5 years warranty on luminaire and driver. Certifications: CE, ENEC. Luminaire with halogen free leads. The luminaire has been developed and produced according to standard EN60598-1 in a company that is ISO9001 and ISO14001 certified.