A look inside a solar powered LED security light.

This solar powered security light came from a UK supplier on ebay. Somewhat more expensive than the usual tat I take to bits, but actually quite nice.
The bold claim of being a 3W LED light and running for 8 hours of continuous triggering on a full charge is valid in the sense that the LED will emit about 3W on a fully charged lithium cell, but the intensity will go down progressively over the discharge time to literally a fraction of a watt.
That said, it's very stylish and modestly well constructed.