FWIW, I was the one who took both lighting sets apart. Since my Poser refused to open either of them, I had to resort to opening them as word documents so I could compare creation/modification dates and the specific mathematics. BH's preceded Bebop's, and the only difference between the two was a consistent factor in the numerics defining the lights themselves. Bebop may have been a very giving person with some wonderful freebies and products (and yes, I have a number of them myself), but he also has some rather serious issues to work out. I don't know that he is or is not Tisa, but there was certainly little doubt about the "zoeloves" and "virchual" nicks, among others. If he was Tisa, then it would certainly reflect a change in his approach.