I was just browsing some bass stuff on eBay and came across these. FretFX LED fret markers. It actually looks kind of cool - it seems to make the bass look unique, and there have been plenty of times I needed a product like this in darker clubs (when my band played the Whisky/Roxy, I could barely see the black block inlays on my Ged). Any clue about these things? Do they have a reputation of some sort?