Borg 5144GR is a post-top luminaire shaped as a flat disc 51.2 cm in diameter and 15.4 cm high. The body is cast aluminium powder-coated in graphite RAL 7016, and a satin PMMA diffuser closes the disc from below, sealed with silicone.
What is in the box and how it is mounted
The luminaire comes without a pole and slides onto a 60 mm pole spigot to a depth of 95 mm. Norlys sells the reducer 3070XX0009 and the mounting adapter 154XX0010 separately. A 6 m H05RN-F 6G1 cable leaves the luminaire and is connected in a suitably chosen junction box.
The side area of the luminaire is 0.042 m² – the figure to compare with the permitted wind load of the chosen pole.
What light it gives
The LED module draws 27.2 W and produces 4380 lm, and the complete luminaire delivers 4059 lm at 32 W, which is 126.8 lm/W. The satin diffuser makes the disc glow evenly, without glaring points. 4000 K is neutral white with no yellow or blue cast. CRI 80 is standard for outdoor lighting, and SDCM3 keeps one tint along a row.
All light goes downwards (ULOR 0 %). The manufacturer gives photometric data for a 4 m mounting height. The light source has energy efficiency class D.
Control and installation
The driver works in the D4i system, which is based on the digital DALI protocol, and is factory-set to the maximum permitted current. Dimming and other settings need a D4i-compatible controller – an ordinary dimmer will not work. The Zhaga Book 18 socket takes a standardised sensor or control module.
As a class I luminaire it needs a protective earth. The inrush current is 21 A for 300 µs – a value to take into account when choosing the circuit breaker for the whole circuit.
Durability and service
IP65 means dust-tight and protected against water jets, and IK08 means resistance to 5 J impacts. The luminaire works from −20 to +45 °C. The LED module keeps 90 % of its flux for more than 54 000 hours (L90) and the driver has a lifetime of 100 000 hours; both are replaced by a professional service. The flat, smooth form suits modern and minimalist architecture – by a driveway, on a terrace, along a street or park paths.
