George,
The only 2 things I can caution you on: When you install the array, do NOT oil the fingerboard the day before! The original instructions from FretFX said to clean the fingerboard edge with isopropyl alcohol, but now that step has been omitted. After doing both these things on my Dean 6 string bass, I noticed that some of the LED?s light leaks out around the LED, and along the array. This looks a little sloppy, and probably is caused by a less than perfect adhesion. A small price to pay when compared to the expensive, yet perfectly illuminated circles from permanently installed factory LED?s. So to get the best results, just clean the fingerboard with a soft cloth before installing, and oil the board a few months later. I would take care to oil only the top of the board spreading thinly.
As I previously noted, I also removed a small amount of adhesive from the LED array so it won?t stick to the adjustable nut. Just ask me if you need detailed instructions.
As far as the brightness of the LED?s on the low setting: This is the setting I use most of the time for the Red and the Blue LED?s. It is more than adequate. The red will not hinder your night visibility at either setting. The blue is really brilliant, and at the high setting can play tricks with your eyes. On a black stage you may not be able to see the front of the fingerboard at all. However, you won?t lose your fret reference with them.
You won't be sorry when you buy them!
Kris