I get this all the time when someone asks how deep can we fish your
light stick before it implodes. Well the good people at Lindgren Pitman answered my questions.
The electralume LED
light has been tested to 2200 ft for 3 months and no leaks.
The Valor 43 light stick and the twin stick Duralume both made it below 1000+ feet so it's safe to say that there will be no leaking at the depths we normally fish for Swords.