At a glance
DALI dimmable surface mounted LED downlight in cylinder shape, Ø115 × 120 mm, 26 W with 3,100 lm (119 lm/W). The DALI-2 driver is built in, and the control line connects to its own terminal inside the luminaire. Each luminaire is individually addressable and can be added to groups and lighting scenes, also via KNX. For meeting rooms, reception areas and corridors with 2.7 to 4 m ceiling height. Colour temperature 3000 K or 4000 K, measured by us at Ra 84 to 85. White or black housing, silver-look reflector. Project item: lead time approx. 4 weeks. Without dimming, the same luminaire is available as Ø115 on/off.
A small DALI downlight for surface mounting, with no ceiling cut-out. In the meeting room the light dims down for the presentation, at reception there is one scene for the day and one for the evening, and in the corridor a presence detector keeps a dimmed background light on until someone comes along.
DALI-2built-in driver, separate terminal for the control line
3,100 lmfrom a 115 mm diameter at 26 W
Ra 84–85measured by us, data sheet states Ra ≥ 80
EUmade in the EU, ENEC certified driver
What DALI does in these rooms
DALI is a digital control bus for lighting. Each luminaire has its own address and can be dimmed on its own or in groups. Brightness levels are stored as lighting scenes and recalled by push button, time schedule, presence detector or building automation.
Meeting and training rooms
Scenes for meetings, presentations and video calls. The luminaires in front of the screen can be dimmed separately from those above the table.
Reception and waiting areas
Full light during the day, dimmed background lighting in the evening. With a time schedule this runs by itself.
Corridors and stairwells
With a DALI presence detector a dimmed background light stays on. When someone comes, the light goes up and then returns to the lower level.
Why only 26 W?
With DALI you set the brightness by dimming. A 26 W dimmed to 50 % gives roughly as much light as the 13 W version at full power, so a separate low-power version adds little. If your project still needs 13 W with DALI, please ask us.
If you only want to switch on and off, you do not need DALI. For that there is the Ø115 on/off, which looks exactly the same.
How dimming looks in the room
Choose a room and a dimming level. The images show 4000 K at full power and dimmed.
You choose the colour temperature when ordering: 3000 K warm white or 4000 K neutral white. The selected colour temperature is dimmed and does not change.
Connecting DALI: what you need
The DALI driver sits inside the housing. The luminaire has one terminal for the mains supply (L, N, PE) and a separate terminal for the two wires of the DALI control line. No external control gear is needed.
| Component |
Purpose |
| Cable to the luminaire |
Mains (L, N, PE) and DALI (DA, DA). The DALI wires may run in the same cable, e.g. a 5-core 1.5 mm² cable (NYM-J 5 × 1.5 in Germany). |
| DALI bus power supply |
supplies the voltage on the control line, often built into the controller or gateway |
| Control |
DALI controller, push button coupler, presence detector with DALI or a KNX-DALI gateway |
| Commissioning |
assign addresses, set up groups and scenes, with software or on the gateway |
| DALI key data according to IEC 62386 |
Value |
| Devices per DALI line |
up to 64 addresses |
| Groups per line |
16 |
| Lighting scenes per luminaire |
16 |
| Cable length per line |
up to 300 m at 1.5 mm² |
| Polarity of the control line |
any |
General values of the DALI standard. How many luminaires you can actually connect per line also depends on the current of the bus power supply. We are happy to check this for your project.
Which ceiling height?
The table shows the illuminance directly below one luminaire, calculated from the light distribution curve in the data sheet. The Ø150 DALI with 40 W is shown for comparison.
| Distance luminaire to floor |
Ø115 · 26 W · 100 % |
Ø115 · 26 W · 50 % |
Ø150 · 40 W · 100 % |
| 2.5 m |
approx. 600 lx |
approx. 300 lx |
approx. 775 lx |
| 3 m |
approx. 410 lx |
approx. 205 lx |
approx. 535 lx |
| 3.5 m |
approx. 305 lx |
approx. 150 lx |
approx. 395 lx |
| 4 m |
approx. 230 lx |
approx. 115 lx |
approx. 300 lx |
Calculated values for 4000 K: around 1,200 cd per 1,000 lm at the centre, divided by the square of the distance. One luminaire, no reflection. The brightness in the room depends on the number and spacing of the luminaires.
The Ø115 suits rooms from about 2.7 to 4 m. In higher rooms the Ø150 DALI with up to 4,025 lm is the better fit. Both look the same and can run on the same DALI line.
Measured by us
We measured with a spectrometer at full power on 15 October 2026.
| Value |
3000 K |
4000 K |
Data sheet |
| Measured colour temperature |
3058 K |
3961 K |
3000 / 4000 K |
| Colour rendering Ra |
85 |
84 |
≥ 80 |
| CQS |
86 |
85 |
– |
| Flicker (full power) |
0 % |
0 % |
– |
Measured on a sample with on/off driver. LED and optics are the same in the DALI version. How a DALI driver behaves when dimmed depends on the driver; we have not measured this yet.
3000 K: readings and spectrum from the spectrometer, 15 October 2026.
4000 K: readings and spectrum from the spectrometer, 15 October 2026.
Illuminance and foot candle values in the screens depend on the measuring distance and say nothing about the luminaire.
Finishes
White or black housing, silver-look reflector. White or black reflectors are available on request, please note this in the order comment. The lead time stays at approx. 4 weeks.
White housing · silver-look reflector
Black housing · silver-look reflector
Installation
Screw the galvanised steel mounting plate to the ceiling and twist the housing on with the bayonet fitting. Connect the mains and DALI cable to the terminals in the luminaire first. Protection class I, IP20 for dry indoor rooms. The connection must be made by a qualified electrician.
Technical data
| Power |
26 W |
| Luminous flux |
3,100 lm (manufacturer data at 4000 K) |
| Efficacy |
119 lm/W at full power |
| Colour temperature |
3000 K warm white or 4000 K neutral white |
| Colour rendering |
Ra ≥ 80 according to data sheet, measured Ra 84–85 |
| Colour tolerance |
SDCM 3 (initial) |
| Optics |
reflector with additional prismatic lens in front of the LED |
| Lifetime |
55,000 h (L80B10) at 25 °C |
| Photobiological safety |
risk group 1 (EN 62471) |
| Energy efficiency class light source |
E |
| Control |
DALI-2 (IEC 62386), dimmable, individually addressable |
| Driver |
built in, branded DALI-2 driver, ENEC certified |
| Connection |
terminal for 220–240 V (L, N, PE) and separate terminal for the DALI control line (DA, DA) |
| Dimensions |
Ø115 × 120 mm |
| Weight |
0.7 kg |
| Housing |
aluminium, powder coated, white or black |
| Reflector |
silver look (standard), white or black on request |
| Mounting |
galvanised steel mounting plate, bayonet fitting |
| Ingress / impact protection |
IP20 / IK06 |
| Protection class |
I |
| Lead time |
project item: approx. 4 weeks |
| Manufacturer |
Licatec, luminaire manufacturer from Saxony, Germany, made in the EU |
| Series |
APDR |
| Other power rating |
13 W as DALI on request |
Download data sheet (PDF)
Need it faster?
The surface downlights are project items with a lead time of approx. 4 weeks. If your deadline is tighter, our large round ceiling lights are an alternative, also with DALI. They are available faster, only 86 mm deep and send 30 % of their light up to the ceiling.
approx. 2,300 lm according to the manufacturer. For meeting rooms and corridors.
approx. 4,410 lm according to the manufacturer. For conference rooms and reception areas.
approx. 4,620 lm according to the manufacturer. A large eye-catcher above the reception desk.
All three DALI-2 dimmable, colour temperature switchable on the luminaire between 3000, 4000 and 5700 K, UGR 19, IP20.
Suitable alternatives
The same luminaire without DALI, for corridors with motion sensors and side rooms.
Same look, larger and brighter. For foyers, halls and rooms from about 4 m.
All DALI luminaires at a glance.
Frequently asked questions about DALI
Is the DALI driver internal or external?
Internal. The DALI driver is built into the housing of the luminaire. No external control gear is needed.
Is there a terminal for the DALI control line?
Yes. The luminaire has its own terminal for the two DALI wires, separate from the terminal for L, N and PE.
Which cable do I need?
The luminaire needs L, N and PE plus two wires for DALI. The DALI wires may run in the same cable as the mains, for example a 5-core 1.5 mm² cable. A separate bus cable is not needed.
Do I have to watch the polarity of the DALI line?
No. By standard, the DALI control line is polarity-free, so the two wires can be connected either way round.
What do I need apart from the luminaires?
A DALI bus power supply and a control, for example a DALI controller, a push button coupler, presence detectors with DALI or a KNX-DALI gateway. The bus power supply and the control are often combined in one device.
How many luminaires fit on one DALI line?
The standard allows up to 64 addresses per line. How many it is in your project also depends on the current of the bus power supply. Larger installations use several lines.
How long can the DALI line be?
Up to about 300 m per line with a 1.5 mm² cross-section. That is enough for most buildings.
Can I integrate the luminaires into KNX?
Yes, via a KNX-DALI gateway. Groups, scenes and time schedules can then be controlled from KNX. Cologne LED has carried out many projects with DALI and KNX, and we are happy to help you choose.
Do the DALI luminaires work without a control?
In their factory setting, DALI drivers usually switch on at full brightness as soon as mains voltage is applied. For dimming and scenes you need a control. If the control comes later, you can still put the luminaires into operation beforehand.
What is the difference between DALI and KNX?
DALI is a bus for lighting only: it connects luminaires, push buttons and sensors and controls brightness, groups and scenes. KNX is a bus for the whole building, including heating, blinds and ventilation. Many projects use both: KNX controls the building, and a KNX-DALI gateway passes the commands on to the DALI luminaires.
Can any luminaire be made DALI capable?
Only if a DALI driver is fitted. This downlight has one from the factory: the DALI driver sits inside the housing, and you only connect the control line.
Is it DALI or DALI-2?
DALI-2. The luminaires use DALI-2 drivers. They also work with older DALI controls, as DALI-2 is backward compatible.
Can I run Ø115 DALI and Ø150 DALI on one line?
Yes. Both have the same DALI equipment and the same colour temperature. Many projects use the Ø150 in the high foyer and the Ø115 in the adjoining meeting room or corridor.
Is the Ø115 DALI also available with 13 W?
On request. In most cases the 26 W is enough, dimmed to the brightness you want. Dimmed to 50 %, it gives roughly as much light as the 13 W at full power.
Does the colour temperature change when dimming?
No. The luminaire is dimmed in the selected colour temperature, 3000 K stays 3000 K. This luminaire does not shift colour when dimmed.
What is the lead time?
Approx. 4 weeks, as the luminaire is a project item. If you are working to a fixed date, please call us first.
Who makes the luminaire?
Licatec, a luminaire manufacturer from Saxony, Germany. It is made in the EU, and the integrated driver is ENEC certified.
Advice for your DALI project
