New surface mounted LED downlights: cylinders in Ø150 and Ø115, also with DALI-2
Many buildings have them: cylindrical downlights in foyers, seminar rooms, corridors, waiting rooms and stairwells. For replacing them we now stock surface mounted LED downlights in the same shape, in two sizes and optionally with DALI-2.
Four versions
| Luminaire | Power | Luminous flux | Typical use |
|---|---|---|---|
| Ø150 on/off | 18 or 33 W | up to 3,750 lm | foyer, hall, gym, 3 to 6 m |
| Ø150 DALI-2 | 33 or 40 W | up to 4,025 lm | halls and foyers with lighting scenes, from 4 m |
| Ø115 on/off | 13 or 26 W | up to 3,100 lm | corridor, stairwell, waiting room |
| Ø115 DALI-2 | 26 W | 3,100 lm | seminar and meeting room, reception |
Luminous flux according to the manufacturer at 4000 K. All four come with a white or black housing and in 3000 K warm white or 4000 K neutral white. The reflector is silver-look, white or black on request.
Same shape, two sizes
The Ø150 is 143 mm high and made for high foyers and halls. The Ø115 is 120 mm high and suits rooms up to about 4 m, which covers most seminar rooms, corridors and stairwells. Both look the same. At 4000 K the colour points of our samples were so close that no difference is visible in everyday use, so a foyer and the corridor next to it also match in colour.
No ceiling cut-out is needed: screw the mounting plate to the ceiling, connect the luminaire and twist the housing on with the bayonet fitting. The driver is built in and the luminaire runs directly on 230 V.
Switching to DALI: check the cable first
The DALI versions have a DALI-2 driver inside the housing and a separate terminal for the control line. Each luminaire is individually addressable, groups and scenes can be stored, and a KNX-DALI gateway connects them to KNX.
In existing buildings our first question is which cable arrives at the ceiling. DALI needs two wires in addition to L, N and PE, and they may run in the same cable. If a 5-core cable is already in place, new luminaires and a controller are enough. If only three cores arrive, the on/off version, which looks exactly the same, is the alternative, or a new cable is pulled.
Measured by us
We measured the samples with a spectrometer at full power in October 2026: Ra 84 to 85, CQS 84 to 86, flicker 0 to 1 percent. The data sheet states Ra ≥ 80. The samples had on/off drivers; LED and optics are the same in the DALI versions. The readings and spectra are shown on the product pages.
Lead time
The surface downlights are project items with a lead time of approx. 4 weeks. If you need them sooner, our large round DALI ceiling lights in 40, 60 or 80 cm are an alternative. They are available faster and are DALI-2 dimmable as well.
Replacing old downlights in your building?
Call us on +49 221 29821660. We will go through size, power, control and quantity with you.
