Were Remans truly so great bodyguards and soldiers?

While reading Reman definition at Memory Alpha, I found this piece of text:

As Remus was a tidally locked planet, the Remans live on its dark side, and thus were extremely sensitive to light.

Followed by this one:

Among the Romulan people, Remans have historically been known as great warriors. As such, Romulan senators often had Reman bodyguards in their employ to intimidate possible opponents.

How can these two texts stands together? How can someone become a great warrior and a good bodyguard, if he / she is "extremely sensitive to light"? Romulus is not a tidally locked planet, it has days and nights. How can Remans serve so well in these conditions (mostly, during day)?