Don't forget that you are buying a standalone photovoltaic system for 20-25 euros and for that money, I consider it good. So, I have installed it for 2 months in a 30 square meter warehouse and with the three lamps it has, the light is more than satisfactory. I turn on the lamps (all of them + the spotlight) for 3 to 4 hours a day, 3 to 4 times a week, even with cloudy weather, and I haven't noticed any decrease in the intensity of the lamps. The spotlight is placed outside and covers a decent distance of 6 to 7 meters. Pay attention to the connections of the lamps because they are not good internally (you can open it and fix it or if the hands don't reach, just tie the wire to the hole so you don't have to worry about it). The spotlight has a remote control for on, off, and auto, but unfortunately, I haven't figured out how the sensor works yet... I would appreciate it if someone could share it with us! I don't regret it at all!!!