Took another 4~~5 hours before I managed to sorta re-create this render, though the models were right there on screen.

My best guess seems to be for the lights' D/H/A to be pale blue, with reflection to multiply by lights, not object colour. Dial 'Advanced' default ambiance value of one (1) unto 50~~99, then render with Superfly.

One snag is a lot of material menu values seem to mutate when your back is turned. Another, renders are 'noisy', so I had to double the 'pixel' count...

I learned to render 'progressive', to allow me to cancel early if no lights within...

There's probably three better ways to do it !!