That is one tight system, maybe over the top for some, but like most of us do...if you love something that much you will pimp it out..same w/cars we own.
Any, well just about any, felt tip highlighter pen will light up under uv. A bud of mine tried that on the lans of a sound card. He ran out of patients before he ran out of ink. Check the dollar stores in your area. The cheap pens appear to work best.
As for the comments about too much or over the top is a matter of perspective. I for one think it's nicely done. Very good for showing off.
" I like it. "