First of all, are you SURE that this is not an 'infomercial'?
I dont know much about 'harris technique', or fancy stuff like that. I do however, practice a lot, shooting in low light conditions. I have Trijicon night sights on all my CCW handguns. I am comfortable, and prepared to take care of bidnez if problems happen under other than perfect conditions.
Nemo Me Impune Lacesset
"The trouble with our liberal friends is not that they're ignorant; it's just that they know so much that isn't so.".........Ronald Reagan