Submersible light fixture with multilayer stack for pressure transfer

A submersible light for high pressure underwater use, comprising:

• an at least partially cylindrical housing shaped and sized for withstanding ambient exterior pressure at a depth of approximately 500 feet or more;
• a transparent pressure bearing window positioned at a forward end of the housing having a thickness for bearing substantially all of the ambient exterior pressure at the depth of approximately 500 feet or more;
• a pressure bearing window supporting structure, including a multilayered stack of substantially flat spacers of a high compressive strength material, for bearing substantially all of the loading applied to the transparent pressure bearing window at the depth of approximately 500 feet or more, mounted in the housing behind the transparent pressure bearing window;
• a water-tight seal between the transparent pressure bearing window and the housing;
• a circuit element configured and positioned within the housing behind the window supporting structure to bear substantially all of the pressure applied to the transparent pressure bearing window by ambient water on an exterior side of the window;
• and
• at least one solid state light source comprising a plurality of LEDs mounted on the circuit element behind the transparent bearing window;
• wherein the multilayer stack includes a window support spacer and an LED spacer positioned between the transparent pressure bearing window and the circuit element.