Ob­jec­tive test­ing

Scuba Diving - - SCUBALAB -

was con­ducted at Wil­ger Test­ing Co., an ac­cred­ited, in­de­pen­dent fa­cil­ity in Sara­sota, Florida. Lights were tested us­ing an in­te­grat­ing sphere, an in­dus­try­s­tan­dard test­ing de­vice that mea­sures a light’s to­tal out­put, in lu­mens, with­out re­gard to its beam an­gle.

To gauge both the out­put and burn time of lights, each light was tested twice; once with a fully charged ( if recharge­able) or new ( if dis­pos­able) bat­tery, and again af­ter dis­charg­ing for a con­tin­u­ous 60 min­utes.

Be­cause dive lights are de­signed for use in wa­ter, many will elec­tron­i­cally re­duce their out­put af­ter a brief pe­riod of burn­ing out of wa­ter to avoid over­heat­ing and

dam­ag­ing cir­cuitry. For this rea­son, measurements taken in the sphere were con­ducted im­me­di­ately af­ter turn­ing on each light.

Fol­low­ing the first test with full bat­ter­ies, all lights were recharged or bat­ter­ies were re­placed, then al­lowed to burn on full power un­der­wa­ter for one hour, then tested again. Can­is­ter lights, which are de­signed for ex­tremely long burn times, were tested af­ter one hour of dis­charg­ing and af­ter four hours. Er­gonomic test­ing was con­ducted at Devil’s Den Spring in Wil­lis­ton, Florida. Test divers us­ing un­der­wa­ter slates scored each dive light in the fol­low­ing cat­e­gories: Ease of Use In­tu­itive­ness and ease of op­er­a­tion of switches and con­trols; ease of se­lect­ing var­i­ous power lev­els or ac­ti­vat­ing emer­gency flash Com­fort/se­cu­rity of Grip or Mount Size, shape of grip; weight, bal­ance and er­gonomics; use­ful­ness of

lan­yard or at­tach­ments Beam Size and Shape Use­ful­ness of the beam’s il­lu­mi­na­tion un­der­wa­ter

Light Out­put Bright­ness, color, pen­e­tra­tion and qual­ity of the light’s beam

Power Lev­els The abil­ity to reg­u­late the beam’s bright­ness in use­ful in­cre­ments Power-level In­di­ca­tor Use­ful­ness of power-level in­di­ca­tor or warn­ing, if equipped

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