RE:I believe it will be light activated because they say theyPH 1 there is nothing to cure in healthy volunteers and this is not an injested drug, so Phase 1 might even be eliminated..HOWEVER, it has been past practice to involve terminally ill patients in PH1 studies. So if I was very ill with bladder cancer and volunteering in PH1, I would dam well want both the 1433 and the light source involved. What can possibly happen during PH1a and 1b other than finding out if there might be a allergic reaction to a compound rubbed on my arm? The fun starts at PH 2a and b. This is where safety, efficacy and effectiveness are measured and the desired outcome occurs.