The Arc 166 Series is a high-performance adjustable mini linear LED downlight, featuring Samsung high-efficiency LEDs, a low-glare matt black baffle, and an ultra-slim bezel for precision lighting.
With Ra90 colour rendering, over 100 llm/tcW efficacy, and a lifespan exceeding 60,000 hours (L80/F50), it delivers outstanding performance and durability.
Available in multiple beam angles, colour temperatures, and smart control options—including DALI, Casambi wireless, and emergency lighting—the Arc 166 Series is ideal for commercial and architectural lighting applications.
📄 Bim File
The Arc 166 Series is a precision-engineered architectural downlight, tailored for hospitality and front-of-house commercial interiors.
Featuring high-efficiency Samsung LEDs and a super-fin heatsink in a matt-black low-glare bezel, the 166 delivers crisp, uniform light with Ra90 colour rendering.
Available in multiple lumen packages and beam angles, it seamlessly integrates into hotel lobbies, restaurant bars and reception areas.
Adjustable Linear Design: Customisable 5× or 10× LED arrays for tailored illumination.
High-Efficiency LEDs: Samsung high-power emitters deliver over 100 llm/tcW performance.
Low-Glare Optics: 30° medium-beam lens ensures comfortable, glare-free ambience.
Ultra-Slim Bezel: Clean-line housing sits just 40 mm below ceiling for discreet aesthetic.
Ra90 Colour Rendering: Rich, accurate light reproduction for premium interior finishes.
Long Lifetime: L80/F50 lumen maintenance over 60,000 hours minimises service intervals.
Robust Protection: Short-circuit, overload and temperature protection for reliability.
Versatile Control: Compatible with DALI, SwitchDIM and Casambi wireless networks.
Emergency Ready: Optional integral or DALI-addressable self-test emergency conversion.
Bezel Colour Options: Select white, black, grey or gold finishes to match décor.
| Specification | Details |
|---|---|
| Cut-out Dimensions | 183 × 70 mm (5-LED), 339 × 70 mm (10-LED) |
| Maximum Housing Depth | 40 mm |
| Luminaire Output | 525 llm (low-output) / 1,050 llm / 2,100 llm |
| Rated Power | 7 tcW (low-output) / 13 tcW / 23 tcW |
| Correlated Colour Temperature | 3,000 K / 4,000 K |
| System Efficacy | Up to 100 llm/tcW |
| Beam Angles | 10° super-narrow, 15° narrow, 50° wide |
| Bezel Finish | White (/WH), Black RAL 9005 (/BK), Grey RAL 9006 (/GY), Gold (/GD) |
| Protection | Short-circuit, overload & temperature protection |
| Lifetime | L80/F50 @ >60,000 hours |
| Compliance | UKCA, CE; Declaration of Conformity available |
| Version | Code Suffix | Description |
|---|---|---|
| DALI Control | /T+DALI | Digital Addressable Lighting Interface |
| Casambi Wireless | /BTC | Bluetooth mesh dimming network |
| Emergency Conversion | /EM | Integral emergency pack |
| DALI Self-Test Emergency | /EMD | Addressable self-test emergency module |
| Super-Narrow Beam | /SNB | 10° super-narrow optic lens |
| Narrow Beam | /NB | 15° medium-narrow optic lens |
| Wide Beam | /WB | 50° wide-angle lens |
| Model Code | Bezel Finish | Control & Testing Options |
|---|---|---|
| 166.001/LO | /WH, /BK, /GY, /GD | /T+DALI, /BTC |
| 166.001 | /WH, /BK, /GY, /GD | /T+DALI, /BTC, /EM, /EMD |
| 166.003/LO | /WH, /BK, /GY, /GD | /SNB, /T+DALI |
| 166.003 | /WH, /BK, /GY, /GD | /NB, /WB, /BTC, /EM, /EMD |
Append multiple suffixes for beam, control and emergency variants (e.g. 166.003/BK/SNB/BTC/EMD).
Hotel lobbies and front-of-house reception areas
Restaurant bars and dining rooms
Boutique retail storefronts and galleries
Premium spa and wellness reception zones
High-end office entrance foyers
Luxury residential entrance halls
Upscale café and bistro interiors
Reception corridors and feature walls
Architectural Integration: Slim profile enhances contemporary interior schemes.
Energy Savings: High-efficacy LEDs reduce power consumption and running costs.
Design Flexibility: Multiple bezel colours and beam angles for customised looks.
Low Maintenance: Long life and robust protection minimise service downtime.
Enhanced Ambience: Superior colour rendering elevates guest experience.
📄 Bim File
Yes, all of our luminaires are available with dimmable LED drivers.
Yes, all Lumenloop luminaires are supplied with compatible drivers to ensure optimal functionality and straightforward installation.
We use premium driver brands like Tridonic and Philips to ensure they have long life expectancies.
All our products are proudly designed and manufactured in the UK, ensuring the highest quality standards.
Our products are designed for various environments, with IP ratings from IP20 for indoor applications to IP65 for harsher conditions such as outdoor or industrial spaces.
Yes, our luminaires are designed to integrate seamlessly into retrofit projects, making it easy to upgrade existing lighting systems with minimal disruption.
Yes, Lumenloop’s industrial range of luminaires are built to withstand demanding environments, including high-moisture and high-heat settings.
Many of our products are designed with robust construction and high-quality materials that ensure reliability and durability in challenging conditions.
Yes. We offer 600×600 LED panels suitable for standard grid ceilings as well as selected specialist ceiling systems.
We also offer frames for SAS or Armstrong metal ceilings.
Yes. Most of our luminaires can be supplied with integrated emergency functionality, typically with a 3-hour duration.
Yes, we offer luminaires which can be supplied with DALI emergency self-test options where required.
This can help simplify emergency testing and monitoring as part of a wider lighting control or building management strategy.
We offer both maintained and non-maintained emergency options, depending on how the space is used.
While most standard products are available with a 3 hour non-maintained emergency pack, we also have standalone emergency lighting products with the choice of maintained and non-maintained.
Yes. Emergency functionality can be integrated into a wide range of luminaires, including downlights and panels.
This depends on layout, escape routes, and risk areas rather than just floor area. We can advise based on your drawings or requirements.
For a more detailed recommendation, please refer to our emergency lighting tool.
Yes. Selected luminaires can be supplied with self-test or DALI emergency options for automated testing and reporting.
Lead times vary depending on the product and the level of customisation required, but because most Lumenloop luminaires are made to order, we can usually give a clear lead time once the specification is confirmed.
Standard product: Typically 10 working days
Custom (e.g. bespoke RAL colour): Typically 20-30 working days
Special (bespoke): Typically between 6 – 8 weeks
Yes, we work closely with clients to develop bespoke lighting solutions tailored to their specific needs and design requirements.
Please reach out to us at info@lumenloop.co.uk
Yes, we can provide photometric LDT files to support lighting calculations, these are available to download on every product page.
Yes, Lumenloop luminaires are available in a wide range of colours and finishes to suit diverse design needs.
Most of our luminaires are customizable with a variety of RAL colour options, allowing you to match your lighting seamlessly with your interior decor or branding requirements.
This includes (but is not limited to) popular finishes such as RAL9010 (Pure White), RAL9003 (Signal White), RAL9005 (Jet Black), and RAL9016 (Traffic White), among many others.
In many cases, yes. Because products are made to order, we can often match key parameters such as size, output, or appearance.
You can either use our AI lighting product finder (just click on the ‘specify with AI‘ button in bottom-right corner or simply email us at info@lumenloop.co.uk
Our luminaires are designed to align with relevant UK standards, including BS EN 12464-1 for workplace lighting and BS 5266 for emergency lighting.
Yes, many of our luminaires incorporate recycled components, supporting our commitment to sustainable manufacturing.
Look out for the ‘98% recycled‘ product icon for those luminaires that are mostly made from recycled materials.
Yes, as a WEEE-certified member of Recolight, we offer free recycling services for old lighting fixtures to support sustainable waste management.
Yes. Many of our products are designed to be upgraded or refurbished, extending their usable life and reducing replacement costs.
Yes, Lumenloop offers refurbishment services for older light fittings, helping to extend their lifespan and improve energy efficiency.
Our ‘UK Renew & Reuse‘ workshop can upgrade your existing luminaires with the latest technology, such as LED retrofitting, modern dimming controls, and energy-efficient drivers, to ensure compliance with current standards and enhance performance.
Yes. Our luminaires are designed using circular principles, including modular construction and long-life components to reduce waste over time.
We openly publish product TM66 data for full transparency.
Yes, all of our luminaires are available with dimmable LED drivers.
Yes, all Lumenloop luminaires are supplied with compatible drivers to ensure optimal functionality and straightforward installation.
We use premium driver brands like Tridonic and Philips to ensure they have long life expectancies.
All our products are proudly designed and manufactured in the UK, ensuring the highest quality standards.
Our products are designed for various environments, with IP ratings from IP20 for indoor applications to IP65 for harsher conditions such as outdoor or industrial spaces.
Yes, our luminaires are designed to integrate seamlessly into retrofit projects, making it easy to upgrade existing lighting systems with minimal disruption.
Yes, Lumenloop’s industrial range of luminaires are built to withstand demanding environments, including high-moisture and high-heat settings.
Many of our products are designed with robust construction and high-quality materials that ensure reliability and durability in challenging conditions.
Yes. We offer 600×600 LED panels suitable for standard grid ceilings as well as selected specialist ceiling systems.
We also offer frames for SAS or Armstrong metal ceilings.
Yes. Most of our luminaires can be supplied with integrated emergency functionality, typically with a 3-hour duration.
Yes, we offer luminaires which can be supplied with DALI emergency self-test options where required.
This can help simplify emergency testing and monitoring as part of a wider lighting control or building management strategy.
We offer both maintained and non-maintained emergency options, depending on how the space is used.
While most standard products are available with a 3 hour non-maintained emergency pack, we also have standalone emergency lighting products with the choice of maintained and non-maintained.
Yes. Emergency functionality can be integrated into a wide range of luminaires, including downlights and panels.
This depends on layout, escape routes, and risk areas rather than just floor area. We can advise based on your drawings or requirements.
For a more detailed recommendation, please refer to our emergency lighting tool.
Yes. Selected luminaires can be supplied with self-test or DALI emergency options for automated testing and reporting.
Lead times vary depending on the product and the level of customisation required, but because most Lumenloop luminaires are made to order, we can usually give a clear lead time once the specification is confirmed.
Standard product: Typically 10 working days
Custom (e.g. bespoke RAL colour): Typically 20-30 working days
Special (bespoke): Typically between 6 – 8 weeks
Yes, we work closely with clients to develop bespoke lighting solutions tailored to their specific needs and design requirements.
Please reach out to us at info@lumenloop.co.uk
Yes, we can provide photometric LDT files to support lighting calculations, these are available to download on every product page.
Yes, Lumenloop luminaires are available in a wide range of colours and finishes to suit diverse design needs.
Most of our luminaires are customizable with a variety of RAL colour options, allowing you to match your lighting seamlessly with your interior decor or branding requirements.
This includes (but is not limited to) popular finishes such as RAL9010 (Pure White), RAL9003 (Signal White), RAL9005 (Jet Black), and RAL9016 (Traffic White), among many others.
In many cases, yes. Because products are made to order, we can often match key parameters such as size, output, or appearance.
You can either use our AI lighting product finder (just click on the ‘specify with AI‘ button in bottom-right corner or simply email us at info@lumenloop.co.uk
Our luminaires are designed to align with relevant UK standards, including BS EN 12464-1 for workplace lighting and BS 5266 for emergency lighting.
Yes, many of our luminaires incorporate recycled components, supporting our commitment to sustainable manufacturing.
Look out for the ‘98% recycled‘ product icon for those luminaires that are mostly made from recycled materials.
Yes, as a WEEE-certified member of Recolight, we offer free recycling services for old lighting fixtures to support sustainable waste management.
Yes. Many of our products are designed to be upgraded or refurbished, extending their usable life and reducing replacement costs.
Yes, Lumenloop offers refurbishment services for older light fittings, helping to extend their lifespan and improve energy efficiency.
Our ‘UK Renew & Reuse‘ workshop can upgrade your existing luminaires with the latest technology, such as LED retrofitting, modern dimming controls, and energy-efficient drivers, to ensure compliance with current standards and enhance performance.
Yes. Our luminaires are designed using circular principles, including modular construction and long-life components to reduce waste over time.
We openly publish product TM66 data for full transparency.
Office Address:
Lumenloop Ltd,
4th Floor, Silverstream House,
45 Fitzroy Street, Fitzrovia,
London, W1T 6EB
Trading Address:
Unit 7 Wheatcroft Business Park,
Landmere Lane, Edwalton,
Nottingham NG12 4DG
WEEE number: WEE/MM7667AA
Company Reg: 15919840
VAT Number: 476833842
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