You just got suited up for your first dive of your vacation in St. Somewhere. You test either your camera system or PC Lite one last time before taking the plunge, and you're Flashlight or Substrobe 100, Ai, Ai/n and your flashlight or aiming light won't work. The worst thing that can happen on a holiday dive, malfunctioning equipment and you don't have a spare bulb.
Don't go on a trip without spares. Replacement bulb for PC Lite and Substrobe 100, Ai, Ai/n: Aiming light, optional high intensity. Bulb is a 5 volt, 7.2 watts halogen lamp and makes a great item for your Save-A-Dive Kit.