I don't think the su probe is illuminated, looks more like the way the studio lighting catches the acrylic rods to me. Note that all the other illuminated props (the black box, Rory's big magnifying glass) are very bright, and have that 'hazy glow' of an electronic prop, that I'm not seeing with the probe.
Hodriss, what did you use for the blue part between the rods, is it a clear pen lid?
Hodriss, what did you use for the blue part between the rods, is it a clear pen lid?