The XL 300 concrete installation housing with transformer is used for the installation of LEDs, low-voltage halogen, energy-saving lamps, metal halide lamps and compact fluorescent lamps. The luminaire installation housing with a diameter of 300 mm enables tool-free and absolutely concrete-tight pipe insertion for pipe sizes M20 and M25 using the Primo membrane technology. In the precast concrete plant or on the construction site, the lids of the installation housings are glued or nailed to the formwork. The box body is brought to the appropriate height using threaded rods, which does not affect the statics. The use of a lid with mineral fiber board enables individual drill hole openings so that the alignment line is perfectly maintained even after the concrete has been poured. The box is closed with a metal plate for increased stability and optimal heat dissipation. In addition, the metal plate offers maximum resistance to impact.