The NUMINOS S PHASE is a surface-mounted spot from the SLV NUMINOS range: a black aluminium cylinder on a short bracket and a round ceiling plate. The form is smooth and undecorated, and the face of the barrel holds a recessed reflector with a prismatic lens. The light comes from a built-in LED module at 4000 K.
How big it is and where it goes
The ceiling plate is 10.3 cm across and 2.9 cm high, the barrel itself 6.5 cm across and 16.2 cm long. The whole luminaire stands 14.5 cm off the surface — a dimension to compare with the place it will sit, because that is how far it reaches into the room.
The manufacturer intends it for ceiling and wall mounting. It works in protection class I, so it needs an earth conductor, and it is made for indoor use; the permitted ambient temperature reaches 45 °C.
How much light it gives, and of what kind
Luminous flux is 1100 lm, more than an old 60 W bulb produced, and it leaves in a cone with a 60° half beam angle. For a spot that is a wide cone: it covers a section of wall or a zone of floor rather than a single object. The 4000 K colour is neutral white, without a yellow cast.
A colour rendering index of Ra 90 means colours look close to how they look in daylight — which matters wherever the colour of goods, a picture or a material has to be right. The manufacturer also gives UGR ≤ 19, the value taken as the glare limit at screen workstations. The LED module is permanently built in: there is no socket and no replaceable lamp, and the stated service life is 50,000 hours.
Aiming and dimming
The barrel turns 350° horizontally and tilts 90° vertically, so once mounted the luminaire can be aimed at almost any point without moving the ceiling plate. The setting is held by a joint clamped with two screws.
The luminaire dims on trailing-edge phase control. To use that you need to buy a dimmer of this type and check its minimum load — the manufacturer publishes a list of compatible models.
