Meprolight Tru-Dot sights are up to 20% brighter than other tritium sights. The front dot is slightly brighter than the rear sight to help the shooter focus on the target. Light tubes are sealed with a patented bonding process that makes them impervious to solvents and oils. Tru-Dot sights have a 10-year illumination warranty.
These sights are not recommended by Meprolight for the XD45 ACP with certain height rear sights. There is an actual sticker on the package that says "Not meant for 45 ACP models". You will need to check your rear sight height. If it is .250", these sights will work for you. If it measures .285", these sights will not work for you.