To cover a 3 m² green wall, it is quite possible to use several 40W recessed LED spots in parallel without significant risk of overheating or excessive consumption, provided that a few essential rules are followed.
Total consumption remains moderate: each spot consumes 40W, so 3 to 5 spots run between 120 and 200W, well below the limits of a standard domestic circuit (16A / 3680W). It is important, however, to ensure that the wiring and electrical protections can handle this load.
The risk of overheating is controlled: the 40W spots are designed to dissipate heat efficiently. Just be sure to respect the recess space and ensure adequate ventilation around the lamps, which is very important in a humid context like a green wall.
Connecting in parallel is suitable provided that suitable drivers or power supplies are used and that the electrical installation is compliant. A qualified electrician can validate this crucial point for a durable and safe installation.
In summary, for efficient and safe lighting of your 3 m² green wall, 3 to 5 well-installed 40W LED spots offer an ideal, powerful, and economical solution.