I had my mount of an electrical shop to 23W Stahler half weeks ago and am despair. The spotlight turns on and off whenever he wants, the settings are ignored. Now I have "Adjust sensor" after just over a week the sensor taped with min. Five layers electrical tape and wrapped a scarf twice and the part remains lit in broad daylight even though the setting is set to night. The range setting between 2 and 14 meters failed totally. I'll claim the part definitely. The light color "warm-white" is very pleasant and the luminous efficiency is quite good. I would have awarded five stars if the sensor would work.