“Two is one, one is none.”
Especially being down deep with the Lizard People, don’t be shy about having more’n one light.
A good headlamp would be a welcome addition, too.
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Oh yeh, just for s&g, get a WK30. Red for preserving low-light vision, and UV to watching things fluoresce. The ’351 gives some great creamy-white light, and the battery’ll last forever underground.