The Sol 4055CS is an outdoor ceiling light shaped as a low cylinder, 20 cm in diameter and 11 cm high. Its body of extruded aluminium profile and aluminium alloy is powder-coated in corten colour (close to RAL 8011) — a coating on aluminium, not weathering steel. A clear UV-stabilised polycarbonate diffuser closes the underside, and the light comes from a built-in Philips Fortimo LED module with the driver inside the fitting — no separate bulb or transformer to buy.
How much light it gives
The LED module produces 2200 lm, and 2101 lm leaves the fitting at 19.1 W, i.e. 110 lm/W. For comparison, an old 60 W bulb gave about 800 lm. 3000 K is warm white with a slightly yellowish tint.
The LED module stays visible through the clear diffuser, which protects the source without hiding it. The light falls symmetrically downwards, and a ULOR of 0.3% means only a negligible share of the flux goes above the fitting.
DALI2 control and servicing
The driver is controlled over DALI2, so brightness is set from a DALI installation — a controller, a wall panel or a building automation system. The datasheet also allows a 176–280 V DC supply, as used with central emergency-lighting batteries.
The LED module and driver are replaced only by a professional service, for which Norlys provides an LED service kit (ZS4043ZX0009) and a driver service kit (ZS4047ZX0009). Rated module life is L70 over 50,000 hours, which at 3 hours a day is more than 45 years.
Mounting and durability
It is screwed to the ceiling through two ø5 mm holes 100 mm apart. The terminals take up to five conductors of 2.5 mm², and conductors up to 1.5 mm² when the supply is looped on to the next fitting. Protection class I requires an earth connection, so installation is a job for a qualified electrician. The fitting weighs 2.42 kg.
IP65 means it is dust-tight and protected against water jets from any direction, so it can work under eaves or an open canopy, and IK10 is the highest impact-resistance class. Norlys intends it for gardens and private grounds — under a terrace roof, in a gazebo, on a balcony or above the front door. The plain, unadorned cylinder is a modern, minimalist design, and the rusty corten tone suits wood, brick and steel façade details.
