Hi. Im making an underwater light for my masters thesis (ROV design). The light will have to withstand 100m depth, so stuff has to be completely waterproof.
Im thinking of using heat sink paste and screwing the LED board onto a aluminium U-profile, and then fill the profile with clear epoxy. The goal is to have approximately 5mm epoxy covering everything, and the aluminium profile conducting the heat out through the back. The led board is fitted with 18x2 LEDs, giving an output of 7200 lumens at 0,7A /54 V. The board is apprx. 25x200mm
As far as i have understood it, most of the heat is transferred out the back of the LEDs, so adding epoxy will not insulate too much.
My main concern is that the LED plastic is not compatible with epoxy, creating a reaction before the epoxy has cured. I believe there has been some issues with these LEDs in contact with silicone oil, where the LEDs turned black.
Do you guys have any experience with molding in the LEDs?
Thanks
Im thinking of using heat sink paste and screwing the LED board onto a aluminium U-profile, and then fill the profile with clear epoxy. The goal is to have approximately 5mm epoxy covering everything, and the aluminium profile conducting the heat out through the back. The led board is fitted with 18x2 LEDs, giving an output of 7200 lumens at 0,7A /54 V. The board is apprx. 25x200mm
As far as i have understood it, most of the heat is transferred out the back of the LEDs, so adding epoxy will not insulate too much.
My main concern is that the LED plastic is not compatible with epoxy, creating a reaction before the epoxy has cured. I believe there has been some issues with these LEDs in contact with silicone oil, where the LEDs turned black.
Do you guys have any experience with molding in the LEDs?
Thanks