I just finished up my final project for school on 16mm 7219. I was using some source 4 lekos to create some highlights in my frame for a day interior. There were small patches that I didn't mind letting burn out. From what I remember they were around 3 1/2 - 4 stops over my incident base reading of a 2. Should I have let them go a little hotter like 4 1/2 - 5? I am sure that 3 1/2 - 4 will be very bright probably burned out white at some points I just don't want to find that I didn't let them go over enough for the effect.