I don't know how to set the exposure to do the lume shots. I have a fairly cheap Nikon digital. Man, I just noticed you have an Oceanaire as an Avatar. I love that watch. I have the black one as well. The yellow seemed to be the most popular among the forums. You don't see black very often. Would you say for the price, that the Oceanaire is one of the better-built offerings? I think it is.