Focus Light for Night Diving

Good points, and I did go back and look at some of my shots at night and see I was using ISO of 100 on that camera.  Embarrassing that I could not remember, but it has been one of "those" weeks.  I went to an AFO focus light several years back, so I have not really paid any attention to the color cast issue since then.  Since my light has the feature, I see no reason not to use it.  But I agree it could be overcome by changing settings.