Casa XXS

Why serial connection is the smart choice for small luminaires like Casa XXS

In professional lighting design, the way luminaires are connected to the driver is a key technical decision. For very small luminaires like Casa XXS, a serial connection is often the most efficient solution — especially in projects with many light points. In a serial (constant current) connection, multiple luminaires are connected in a single loop to one driver. The current stays the same for all luminaires, while the voltage adds up. This method is ideal for compact downlights like Casa XXS, often used in hotels, corridors, or retail interiors. The main advantage of a serial connection is cost efficiency. Many luminaires can work from a single driver, reducing the total number of drivers needed. This simplifies installation and saves money — an important factor in hotel or residential projects with multiple light points. However, selecting the correct driver is essential. To calculate the driver parameters, you need to know the voltage and current of the luminaire. For example, if Casa XXS operates at 3V and 700mA, and you want to connect 10 luminaires in series, the total voltage required is 3V x 10 = 30V. The driver must therefore provide a constant current output of 700mA, with a voltage range that covers at least 30V. Each driver has a minimum and maximum voltage range for safe operation. This information is always available in the driver’s technical specifications. It is important to stay within this range to avoid malfunction or damage. One possible disadvantage of serial connection is the size of the driver. A higher total voltage usually means a larger driver. Therefore, you should plan space for the driver in advance — for example in a ceiling void, technical room, or nearby service cabinet. In contrast, a parallel (constant voltage) connection powers each luminaire individually. While this may allow more flexible wiring layouts, it is less efficient for very small luminaires like Casa XXS. By using serial connection, Casa XXS offers a smart, cost-effective, and minimal lighting solution. It reduces the number of drivers, simplifies wiring, and maintains a clean, elegant ceiling appearance — ideal for refined architectural projects.