A far less expensive alternative is FretFX. For $100 you get your choice of colored LEDs in a thin strip (less than the thickness of a dime) that mounts to the side of the fretboard. I, along with several other club members, have used them with very positive results. Are they as good as the Alembic LEDs in my Further or my Series I 12 string? No way! But they do get the job done very well on a dark stage. There are several threads about these if you do a search.
Bill, tgo