HOW WE TEST
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