Build new "ambilight"-bars from leds. Two bars with eight leds each. I've also upgraded the original led lights and now they also have eight of the same leds each.
So now overall there are 32 leds lighting the desk area. Not really enough to LIGHT anything, but it gives a nice effect in the dark.
All of these are also hooked up to the DIY-dimmer (see project).
The leds are hidden inside an aluminum profile, just large enough for all the wiring.