Teardown of 1W LED downlight to assess for hackability.

I bought this from a Chinese ebay seller to see how hackable it was for changing the colour of the LED. It turns out to be completely hackable, with a screw together LED housing that sandwiches a loose star-style LED onto the back of the housing with enough force to make a good thermal contact aided by heatsink compound.
The LED looks like it has a 3W chip in it, and the power supply is a typical miniature assembly designed to drive up to three 1W LEDs in series. The build quality of the power supply is actually very neat, aided considerably by it's simplicity. It uses the BP9011 chip by Bright Power, which has very little data available onine. A similar chip called an SM7513 has more data available.
These chips only require a rectifier and smoothing capacitor for a DC supply, and a single resistor and capacitor to set the current sensing. They drive a simple two winding transformer using current sensing on the primary, and the secondary that feeds the LEDs usually has just a diode and capacitor for rectification and smoothing.

Here's a link to the item on ebay. http://www.ebay.co.uk/itm/301372360916