I fitted a LED strip to the bottom of the parcel shelf that was suggested earlier in this thread and I was happy with it until the cold weather arrived. The strip of little LEDs kept falling off and as it was battery operated, I had to stick the battery pack into the hatch.
So I bought two of the very same LED lights and I fitted one in the hatch of my 7.5 GTi and the other in the hatch of my wife's 1.4 SE.
They are brilliant, much brighter than the original light.