In order to gain a true appreciation for how technologically advanced our products are, a full suite of material specific tests were recently completed.
These tests included simple three point bending to test for flexibility and to observe the elasticity of the system as whole. Also included were temperature based flexibility tests and maximal compression tests, both to observe the toughness of the system. All tests were performed using a computer controlled Instron machine.
The results were surprising in that the light, a MIU30 unit, exceeded expectations by an incredible margin.
Schedule of Testing:
1) Simple 3-point bending with load rate set at .25 inch/minute. A set of displacement values was decided on, with each displacement value being tested 5 times to observe elasticity of the material. These displacements (extensions) were .25, .35, .45, .55, and .65 inches.
2) Liquid cooled 3-point bending with load rate set at .25 inch/minute. The same displacement values were used, with the light being liquid cooled before each test to -20 C. The purpose was to test for brittleness and potential cracking under cold temperature.
3) Maximal flexion 3-point bending with variable load rate. Starting at our final displacement value (.65 inches) the unit was gradually flexed and released until failure. The purpose was to observe maximal flexibility of the light before failure.
4) Maximal compression test with variable load rate. Test unit was placed between clamping surfaces and an increasing clamping force was applied. This was done for different surface areas, yielding a maximal frontal pressure rating for the light.
Simple 3-point bending:
Results from the simple 3-point bending test exceeded the team’s expectations. Amazing linearity of the force/displacement curve showed how amazingly elastic the system as a whole was. The following chart shows the average force versus displacement (extension) curve for the .65 inch displacement testing round.
Liquid Cooled 3-point bending : Results from this test showed no ill effects to the light; the material remained flexible and did not become brittle. The test unit was cooled to -20C while performing these tests.
Maximal flexion 3-point bending yielded amazing results with a maximal displacement of 1.82 inches at the center point. This shows amazing ability for the light to sustain incredible stresses and still perform flawlessly. All LEDs remained lit until failure was reached at 1.85 inches. See images of this in the gallery below.
Maximal compression test was again an impressive result, with our test light exceeding the maximal ranges of the Instron load cell. This means a sustained force of 10,000 pounds was applied over a surface area of roughly 8 square inches of the lights frontal lens. No electronic components were damaged, all LEDs remained lit and there was no physical damage incurred to the light. This equates to roughly 1250 PSI of pressure on the front face of the test unit.
Take a look at test photos in the gallery:
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