Why do I have two blue and two red wires in my ceiling light fixture?
This appears to be a CFL can with an integral ballast
What you are looking at appears to be a type of recessed &quot;can&quot; downlight that was designed to use a 4-pin compact fluorescent bulb with the ballast for that bulb integrated into the fixture.  (Think of a &quot;tube&quot; style fluorescent fixture that's been zapped with a twisty shrink ray.)
As a result, if you want to do something other than put a CFL in it, you'll need to replace the fixture outright (or have the electrician put a replacement in for you).