These things are pretty good, I have one over my carport and I can't fault it, it's out in the open weather and hasn't deteriorated and the sensor picks up from about 2.5 metres away.
Light is fairly bright and lights up my entire driveway, will be getting another for my porch.
I love German supermarketeers.
120° motion sensor
Amorphous solar panel
10 LED sensor light
Super bright white (SMD) LEDs
Light output: 35-40 lumen
2.3m connection cable
Swivelling light head allows light to be aimed left or right
3 position switch: off/PIR motion sensor/on
IP44 water resistant
Includes 3.7V battery – 900mAh
Charging time: 8 hours
Usage: up to 3.5-4 hours
You can get them for a lot of brands, my Bosch blue has an attachment guide that can be purchased separately.
Don't think the really cheap ones do though.