This procedure tests the ability of the flashlight to withstand extreme cold. The temperature inside the test chamber was measured at -86.7 degrees fahrenheit with a digital meter. All flashlights had new batteries installed before starting the test. And all flashlights were switched to the ON position. After 3 hours, the test was stopped. All flashlights were examined for defects. The LensLight survived the test fully operational.
This procedure tests the ability of the flashlight to withstand extreme heat. All flashlights had new batteries installed before starting the test. All flashlights were switched to the ON position. All test flashlights were placed in an oven at 200 degrees fahrenheit for 3 hours. The temperature was measured with a digital meter. All flashlights were examined for defects at the end of the test period. The LensLight survived the Heat Test without any defects, and continued producing its maximum brightness.
This procedure tests the amount of pressure the flashlight is able to withstand before failure. The test chamber was filled with water and each flashlight was tested separately. Each flashlight was observed in the chamber as the pressure was increased. A bubble trail in the chamber was one easily visible sign of structural failure. The LensLight was the only flashlight to continue emitting light as the pressure in the chamber went beyond 2000 psi. In a final test, the chamber was placed in an industrial press in an attempt to "crush" the LensLight. The chamber was destroyed during this test, but the LensLight continued to operate normally. No moisture was found within the disassembled components.