All Seiko Divers glow like a torch. You mention "not too chunky" so I am going to suggest Seiko sbdc051 or 053 if you like blue. All seiko Divers are really great, but most are a bit chunky. I have or have had skx007 (2x), Turtle (2x), Tuna, Sumo, Samauri, both a blue and black 62 MAS remake (sbdc051/53) + >50 other gens & reps. VERY few other watches even come close when it comes to LUME.