Borg 5147GR is a post-top luminaire shaped as a flat disc, 51.2 cm in diameter and 15.4 cm high. The body is die-cast aluminium powder-coated in graphite RAL 7016, and the underside of the disc is closed by a milky, UV-stabilised polycarbonate diffuser sealed with silicone.
What is included and how it mounts
The pole is not included. It slides onto a 60 mm pole spigot to a depth of 95 mm. Norlys sells the reducer 3070XX0009 and the mounting adapter 154XX0010 separately. The luminaire comes with 6 m of H05RN-F 6G1 cable, to be connected in a suitable junction box.
It weighs 5.68 kg and its side area is 0.042 m². Both figures are checked against the load capacity and the permitted wind load of the chosen pole.
What light it gives
The LED module draws 27.2 W and produces 4380 lm; 3183 lm leave the whole luminaire at 32 W, or 99.5 lm/W. The difference is the price of the milky diffuser: the light is soft and even, without glaring points. 4000 K is a neutral white in which paving and kerbs stay clearly visible. CRI 80 is standard colour rendering for outdoor lighting.
All the light goes downwards: the ULOR is 0%, and the BUG rating B1-U1-G1 means low uplight and limited glare. The manufacturer gives the photometric data for a 4 m mounting height – the reference point for choosing pole height and spacing.
Control and installation
The driver works in a DALI2 system with the NightDim (4DIM) function: the luminaire can be dimmed from a DALI installation and turned down at night according to a programmed profile.
This is a protection class I luminaire, so it needs a protective earth conductor. At switch-on it draws an inrush current of 26 A for 180 µs, which is why up to 18 of these luminaires can run on one B10A circuit breaker and up to 28 on a B16A.
Durability and service
IP65 means the luminaire is dust-tight and protected against water jets, and the surge protection is 6/10 kV. The LED module keeps 90% of its flux for more than 54,000 hours (L90) and the driver is rated at 100,000 hours; both are replaced by a professional service. The flat, smooth form suits modern and minimalist architecture – along driveways, on terraces, along streets and on park paths.
