The disadvantage is that the sensor must be fully exposed to daylight; otherwise, the lamp does not turn off.

No durability against power outages. They burn for fun. Luckily, with the receipt and warranty, a well-known electrical supplies store changes it immediately. The corresponding OSRAM ones, now sold as LEDVANCE, are far better.

It has been installed in a garden where the switch is located outside the house... The sensor works very well, although it should have turned on a little later, but it doesn't run or anything!... Meaning, it turns on even when there is still enough light... Just to give you an idea, now that it is summer, it turns on at 21:10 and turns off at 6:10 in the morning... As for the intensity of the light, it should be a little stronger for its wattage... However, it works VERY well and I recommend it... As for durability, I don't know yet, I will come back if it goes off before its time...

Personally, I was not satisfied at all and returned them (2). Very low sensitivity to light.

Logically, it only works for outdoor use where there is sunlight and provided that the fixture/bulb leaves the photocells completely free. In my bright house, with a relaxed spotlight that allowed space for the bulb and the photocell, the bulb never turned off. I also tried using a spacer to bring it outside the spotlight. Same result. It only turned off when I directed a flashlight onto the photocell. By the way, the photocell is the red one in the pictures.

Meanwhile, I have another lamp from a different company in the basement garage and its photocell works much more reliably. It doesn't turn on if there is light.

In terms of brightness, it was fine for its wattage. But what good is it if it doesn't perform the basics...