Lighting system with down-light emission designed to use monochromatic Warm White 3000K or neutral 4000K LEDs with fixed spot optic. Optical assembly, ceiling base and frame made of diecast alluminium alloy, with acrylic liquid paint treatment with high resistance to atmospheric agents and UV rays; tempered transparent sodium calcium closing glass, 4 mm thick, siliconed to frame. Provided with fast-coupling closing system between frame, optical assembly and ceiling base, without the use of tools. Internal silicone watertight gaskets. Complete with 3 monochromatic power LEDs, Spot 14° or flood 32° optics with plastic lens, black polycarbonate multi-groove ring for visual comfort and built-in electronic ballast. Single cable entrance via black polyamide PG11 cable clamp, suitable for 6.5 - 11mm cables. Connection with three fast-coupling terminals. Possibility to use unipolar cables with 2.4 - 3.4mm diameter. Various accessories available: refractor for elliptical distribution, diffusing prismatic glass and chromatic filters. All external screws are made of stainless steel A2. Ceiling installation with down-light luminous emission. Wiring info: control gear with 220 - 240Vac 50/60Hz electronic ballast.