The attached list contains 50 bright globular clusters.
The faintest GCs in this list are M56 and NGC1261, both have mag 8.3.
NGC4372 has the lowest surface brightness (20.6).
M54 contains the faintest stars (horizontal branch mag 18.2) and it is also the most distant GC in this list (86,400 light years).
Explanations for the columns are at the end of the list.
wikisky.org images with a 28 arcmin field are at
https://picasaweb.google.com/1100488...COTv9cm0msHbSQ