Kikkoman regular is a good, regular soy sauce brand.  Kikkoman Lite is the lower sodium version....
...mentioned in the posts above, not to be confused with light soy.  I don't think Kikkoman makes a light soy.  They are a Japanese brand, not a Chinese, so they may not make light soy.
I use Wei Chuan brand light soy and dark soy.  Lee Kum Kee is another brand I trust, along with the aforementioned Pearl River Bridge.
All of those are available here, but only at asian markets.
Michael