IN A FLASH

Scuba Diving - - SCUBALAB -

Dur­ing our sur­face-sig­nal­ing gear test ( March/april 2017), we found that even well be­fore sun­set, a light is eas­ier to spot at a dis­tance than the most vis­i­ble SMBS had been in broad day­light. That il­lus­trated dra­mat­i­cally why it’s a smart idea to carry a torch not just on night dives but on all open-wa­ter dives (af­ter all, there are many ac­counts of left-be­hind divers who never ex­pected to spend the night at sea). And it also gave us a new ap­pre­ci­a­tion for lights with strobe or SOS func­tions. While we found that flash­ing lights aren’t par­tic­u­larly more no­tice­able than non­flash­ing lights, the benefi t is that flash modes dra­mat­i­cally in­crease bat­tery life. For ex­am­ple, Light & Mo­tion’s Gobe 800 Spot runs for three hours at medium power, but its SOS mode will last up to a day and a half. This fea­ture can be a real life­saver and is worth con­sid­er­ing when choos­ing your backup as well as pri­mary light.

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