This is the best way to add a focus light to your system. This product will not corrode: Ultralight products are extremely long lasting.
The Ultralight Accessory/"Hot shoe" adapter is used to mount a focus light on the top of housing with a shoe-style mount such as the Recsea S95 housing, Sea & Sea housings, Olympus housings such as the PT-050, PT-EP01, or PT-EP03, Nauticam housings, or other manufacturers. Ikelite housings need a different part.
We dive with our products all the time. Please call the Bluewater Photo team at 310-633-5052 with any questions, or email us at email@example.com.