I love love love Nouvatan! I use the whole range on customers but personally have found, on me, that the 16% left on overnight is darker than the 20% rapid tan. My sister left the 20% on overnight (a little experiment we were doing!) and it looked lush! really dark, but she is dark toned anyway. It is trial and error with all colours I think, I will never leave Nouvatan but wouldnt mind a slightly darker too - which isn't orange based! xxx