...snip...
One other point: If you can obtain one a Krill Stick would be preferable. rather than a lightstick.
Rather than a Krill, I'd get the waterproof (option) CR123 based (one or 2 models) "Glo-tube". I've tried to standardize on AA/CR123s (actually moving towards CR123). They do have a blink pattern (in fact, more than one), so...