ED SERIES
HIGH CEILINGS
ED10K · 300mm LED Recessed Downlight 40W · CRI 92 · Trailing-Edge Dimming
The ED10K (300 mm) is a 40-watt high-power LED recessed downlight with trailing-edge dimming for ceiling apertures of 250 to 290 mm — with Samsung® LEDs, CRI 92 (Ra > 90), 4,000 lumens, flicker-free light (< 1 %) and IP44 protection. Designed for high-ceiling commercial spaces: shopping centres, malls, large office buildings, reception halls and conference centres with ceiling heights from 3.5 m.
⚡ 40 Watts · 4,000 Lumens (100 lm/W)
🎨 CRI 92 · Ra > 90 · Samsung® LEDs
📐 Aperture: 250 · 260 · 270 · 280 · 290 mm
💧 Protection: IP44 · Depth: 50 mm + driver separately
🎭 Dimming: Trailing edge · KNX-compatible via dimmer actuator
📐 Beam angle: 110° wide-beam · UGR < 23
🌡 Colour temp.: 3000K Warm White / 4000K Neutral White
🔒 Warranty: 5 years · L90 | B10 · 50,000 h · Flicker < 1 %
Trailing-edge dimmer compatible with Merten, Busch-Jäger, Jung and Gira. Driver included (mounted separately). Four driver configurations available: ON-OFF / 40W trailing-edge / 20W trailing-edge / 40W DALI.
→ Compare all 5 models in the ED Series (110mm to 300mm)
✓
Driver included in the set — mounted separately in the ceiling void
Scope of delivery: ED10K 300mm + 230 V driver + spring clips. At 40W, the driver is mounted separately in the ceiling void, not inside the luminaire body. (Note: Spec icons show “NO DRIVER” from the manufacturer — with the ED10K, Cologne LED always includes the driver.)
Part of the ED Recessed Downlight Series — 5 sizes, 2 dimming variants
110 / 140 / 180 / 245 / 300 mm · Trailing-edge & DALI · all models compared side by side
← Back to Series Overview
⚙️ Available driver variants — ED10K 300mm
The ED10K 300mm is available with four different driver configurations — same luminaire body, different dimming and output options:
Option 1
ON-OFF · 40W
Non-dimmable · simplest installation · ideal where dimming is not required
Option 2 · Standard
Trailing edge · 40W
Full 4,000 lm · steplessly dimmable · for wall dimmers and KNX actuators
Option 3
Trailing edge · 20W
Half power · ~2,000 lm · ideal for lower ceiling heights or reduced output requirements
Option 4
DALI · 40W
Full 4,000 lm · DALI-2 bus · for KNX, building automation, group control
→ View all variants and prices on the product page · Advice on the right option: [email protected]
DALI
Need KNX / DALI bus control for large projects?
Same luminaire body, DALI-2 driver — direct integration into KNX, DALI bus and building automation. For projects with many luminaires or scene control, the preferred solution.
DALI Version →
Professional light quality — in daily operation across demanding commercial projects.
The ED10K 300mm is the high-performance model of the ED Series — in operation in shopping centres, malls, large office buildings, administration buildings, reception halls and congress centres. 4,000 lumens at just 40 watts means efficient operation even during long daily burning hours. With CRI 92, flicker index < 1 % and a 50,000-hour rated life, it sets benchmarks where other options quickly reach their limits.
✔ 40W · 4,000 lm ✔ CRI 92 ✔ Flicker < 1 % ✔ IP44 ✔ 5-year warranty ✔ 50,000 h
Certified:
✓ IP44
CE
RoHS
✓ 5 Yr Warranty
✓ Flicker < 1 %
✓ CRI 92
✓ Samsung® LEDs
✓ 4,000 Lumens
Updated: 17 May 2026
300mm LED recessed downlight for high ceilings — 40W · 4,000 lumens · aperture 250 to 290 mm
The ED10K 300mm is not a standard recessed downlight — it is the professional high-ceiling downlight for demanding commercial projects. With 40 watts and 4,000 lumens it delivers 67 % more luminous flux than typical 300mm flat panel fittings at 24 W — at identical efficacy of 100 lm/W. Available in 3000K Warm White or 4000K Neutral White, with a very good colour rendering of CRI 92 (Ra > 90).
It fits ceiling apertures from 250 to 290 mm — the typical openings in commercial and public-sector buildings. Dimmable via standard trailing-edge wall dimmers or KNX dimmer actuator. DALI-2 version for large projects available separately.
⚡ ED10K 300mm vs. typical flat 300mm LED ceiling panel — a direct comparison
| Feature |
ED10K 300mm
(Cologne LED)
|
Typical flat
300mm LED panel
|
| Power |
40 Watts |
24 Watts |
| Luminous flux |
4,000 Lumens |
~2,000–2,400 lm |
| Colour rendering |
CRI 92 (Ra > 90) |
CRI 80 (standard) |
| Rated life |
50,000 hours |
~25,000–30,000 h |
| Suitable for high ceilings |
✓ from 3.5 m |
No (insufficient lumens) |
| Compatible aperture |
250–290 mm (5 sizes)
|
usually only 280–290 mm |
| Warranty |
5 years |
usually only 24 months |
| Dimmable |
✓ Trailing-edge + DALI |
Often limited or none |
| Flicker index |
< 1 % (flicker-free) |
Not specified |
Conclusion: The ED10K 300mm delivers 67 % more light, covers a far wider aperture range of 250–290 mm (typical flat panels only fit 280–290 mm), offers a 5-year warranty instead of the standard 24 months — all with better colour rendering, twice the rated life and genuine dimming capability.
Typical applications: LED recessed downlight for high ceilings in commercial buildings
🛍️ Shopping centres, malls & large-format retail
🏢 Large office buildings & administration centres
🏛️ Reception halls, foyers & entrance areas
🏨 Large hotel lobbies & congress centres
🎪 Event spaces & exhibition halls
🏥 Clinics, public buildings & government facilities
For even larger spaces or ceiling heights above 4 m → additional luminaires recommended; consult our lighting design team.
Colour temperatures — spec overview 3000K and 4000K
3000K Warm White
Warm atmosphere · hospitality, retail showrooms, hotel lobbies
4000K Neutral White
Crisp, neutral light · offices, retail, conference rooms, shopping centres
✓ Note on the spec icons: The icon strip shows “NO DRIVER INCLUDED” from the manufacturer — with the ED10K 300mm, the driver is always included in the delivery and mounted separately in the ceiling void.
Light quality: CRI 92 · 4,000 lumens · flicker index < 1 %
-
40W · 4,000 lumens — 67 % more light than typical 300mm panels at 24W
- Very good colour rendering CRI 92 (Ra > 90)
-
Flicker-free — flicker index < 1 % (IEC-compliant)
-
UGR < 23 — EN 12464-1 compliant for workplaces and retail
CRI 80 vs. CRI 90+ — see the difference for yourself
In large spaces with many light sources, the quality difference is especially pronounced. Drag the slider and pay close attention to reds, teal and skin tones.
CRI 80
CRI 90+
In food retail with high ceilings, light quality directly influences purchasing decisions — CRI 90+ makes the difference visible.
Standard LED CRI 80Cologne LED CRI 90+
CRI 80
CRI 90+
Florists, exhibitions and showrooms: CRI 90+ renders colours as they truly are, across the full test spectrum.
Standard LED CRI 80Cologne LED CRI 90+
CRI 80
CRI 90+
Gallery and showroom lighting: DIN EN 12464-1 requires CRI > 90 — the ED10K 300mm exceeds this with CRI 92.
Standard LED CRI 80Cologne LED CRI 90+
What you see: At CRI 80, red and cyan spectral components are missing — reds turn brown-tinged, teal blurs into blue-grey. CRI 90+ renders the visible spectrum almost exactly as daylight — verifiable to
CIE 13.3 / TM-30-20.
IP44 — suitable for damp locations within buildings
With protection class IP44, the ED10K 300mm is also suitable for damp areas within buildings — such as covered outdoor entrances to large commercial buildings or interior spaces with elevated humidity.
Dimensions & Installation
| Outer diameter |
300 mm |
| Ceiling aperture |
250 · 260 · 270 · 280 · 290 mm |
| Installation depth |
50 mm (luminaire body) + driver separately |
| Beam angle |
110° wide-beam |
The driver is mounted separately in the ceiling void or surface-mounted enclosure at 40W — not inside the 50mm luminaire body. Rule of thumb: the aperture must be at least 10 mm smaller than the outer diameter.
Compatible ceiling apertures at a glance
250 mm
260 mm
270 mm
280 mm
290 mm
Advantage over typical 300mm flat panels: These usually only cover 280–290 mm apertures. The ED10K fits apertures from 250 mm upwards — greater flexibility for existing installations.
Aperture 200–230 mm? → ED8KX 245mm (20W). Aperture > 290 mm? → 320mm silver reflector.
What's in the box — driver included
COMPLETE SET
Everything included — ready to install
-
1× LED recessed downlight ED10K (300mm, white, chosen colour temperature 3000K or 4000K)
-
1× 230 V driver (dimming variant as ordered) — mounted separately in ceiling void
- Spring clips for tool-free ceiling installation
- Installation guide (see downloads)
Important: At 40W, the driver is larger than on smaller models and is mounted separately in the ceiling void or surface-mounted enclosure — not inside the luminaire body itself.
Tested dimmer compatibility
Note on 40W per luminaire: The higher wattage significantly reduces the maximum number of luminaires per dimmer circuit. For installations with more than 3 luminaires, we strongly recommend the
DALI-2 version with a central controller — no minimum-load issues, suitable for large-scale commercial projects.
KNX / Smart Building
Compatible with KNX trailing-edge dimmer actuators (e.g. MDT, Gira). For large KNX projects we strongly recommend the DALI-2 version of the ED10K 300mm — cleaner addressing, no minimum-load issues, direct group control.
Important: Use only LED-compatible trailing-edge dimmers. Standard leading-edge dimmers for incandescent bulbs are not approved and may cause flickering or damage.
Features & benefits at a glance
-
40W · 4,000 lumens — 67 % more light than typical 300mm panels at 24W
- Very good colour rendering CRI 92 / Ra > 90
-
Flicker-free — flicker index < 1 % (IEC-compliant)
-
IP44 — suitable for damp locations
- Steplessly dimmable via trailing-edge · DALI version available separately
-
5-year manufacturer warranty — vs. typical 24 months for flat panels
-
3000K Warm White or 4000K Neutral White
- Rated life 50,000 hours (L90 | B10) — approx. 2× flat panel lifespan
- Wide aperture range: 250 to 290 mm (5 sizes)
- Premium Samsung® LEDs
Show full technical specifications
▾
| Outer diameter |
300 mm |
| Ceiling aperture |
250 · 260 · 270 · 280 · 290 mm |
| Installation depth |
50 mm (luminaire body) + driver separately |
| Power |
40 Watts |
| Luminous flux |
4,000 Lumens · Efficacy: 100 lm/W |
| Colour rendering |
CRI 92 / Ra > 90 |
| Colour temperature (selectable) |
3000K Warm White or 4000K Neutral White |
| Beam angle |
110° wide-beam |
| Protection class |
IP44 |
| Glare value (UGR) |
UGR < 23 (EN 12464-1 compliant) |
| Flicker behaviour |
Flicker-free · flicker index < 1 % |
| Rated life |
50,000 hours · L90 | B10 |
| Mains voltage |
230V / 50–60 Hz (220–250V) |
| Dimming |
Yes (trailing-edge or DALI-2 — depending on variant ordered) |
| Tiltable |
No (fixed installation) |
| LEDs |
Samsung® mid-power LEDs |
| Energy consumption / 1,000 h |
40 kWh |
| Operating temperature |
10°C to 45°C |
| Energy efficiency |
Class A |
| Warranty |
5-year manufacturer warranty |
Downloads — data sheets & installation guide
All models in the ED Series — 5 sizes, 2 dimming variants
The ED10K is the highest-powered model in the complete ED Recessed Downlight Series:
ED3KX
110 mm
Aperture 90–100 mm
8 W · 700 lm · CRI 94
ED4KX
140 mm
Aperture 110–130 mm
11 W · 1,100 lm · CRI 94
ED6KX
180 mm
Aperture 150–170 mm
15 W · 1,500 lm · CRI 90+
ED8KX
245 mm
Aperture 200–230 mm
20 W · 2,000 lm · CRI 92+
HIGH CEILINGS
ED10K
300 mm
Aperture 250–290 mm
40 W · 4,000 lm · CRI 92
→ Compare all 10 ED Series variants side by side
Frequently asked questions about the 300mm ED10K
What is the difference between the ED10K and a standard 300mm LED ceiling panel?
The ED10K is a genuine recessed downlight — not a flat LED panel. At 40W and 4,000 lumens it delivers 67 % more light than typical 300mm panels at 24W, has CRI 92 instead of CRI 80, lasts 50,000 hours instead of ~25,000h, and carries a 5-year warranty instead of the typical 24 months. It also covers apertures from 250–290 mm (flat panels usually only fit 280–290 mm) and is genuinely dimmable and flicker-free.
What ceiling height is the ED10K 300mm designed for?
With 4,000 lumens, a single luminaire at ceiling heights of
3.5–5 m covers approximately 8–12 m² of floor area. Ideal for shopping centres, malls, large office buildings and reception halls. At normal ceiling heights (2.5 m), the smaller
ED8KX 245mm at 20W is often sufficient.
Which driver variant should I choose?
Option 1 (ON-OFF) for simple switching without dimming. Option 2 (40W trailing-edge) is the standard dimmable version for up to 3 luminaires per dimmer. Option 3 (20W trailing-edge) for lower ceiling heights where full output is not required. Option 4 (DALI) for KNX building automation or installations with more than 3 luminaires per circuit. Contact us if unsure — we advise free of charge.
Why is the driver mounted separately?
At 40W, the driver is physically larger than those used in smaller models and does not fit compactly within the 50mm installation depth of the luminaire body. It is therefore mounted in the ceiling void or a surface-mounted enclosure. This keeps the luminaire body compact and the installation tidy.
When should I choose the DALI version for KNX?
When you need
more than 3 luminaires per circuit, KNX building automation or scene control (e.g. different lighting profiles per zone in a shopping centre). The
DALI-2 version of the ED10K uses the same luminaire body — only the driver differs.
Project advice or lighting design?
For larger commercial projects (shopping centres, offices, hotels) we advise you personally on lighting design, number of luminaires, driver selection and whether trailing-edge or DALI is the better solution.
← Back to ED Series overview (compare all 5 sizes)
