UVA/UB Lights helping increase potency

Is all the hype about adding these UVA lights the last couple of weeks of flowering will help increase potency by 3 to 5 % true ?

I doubt it! If your grow methods have not produced a high potency; I do not believe that an extra light spectrum would do much in such a short period of time.

I wanted to see if anyone on here had actually tried this.