I don't know if this will help or not, but I own 4 guns with CT laser grips on them.
I've practiced shooting (both day light & dark) with them all.
I can only tell you that in the daylight I shoot at 20' to 45' and had no trouble seeing the red dot.
In the dark it can be seen at forever distances.
I went to the CT website and they didn't say anything about distances for use.
You may have to call their tech department for more.
As I'm sure you know - you sight in a laser at a certain distance and it's only "right on" at that distance.
You will need to correct if the distance changes drastically.
I hope this helps ... I'm really sold on the use of laser grips.