A luminaire according to one embodiment includes a DC power supply circuit, a switching power supply, and a lighting load. The bulbous balloon has two larger diameter bulb segments located on each side of a smaller diameter waist and can be used to post dilate a TAVR device that has been implanted at the site of a stenotic aortic valve. A fluid pathway extends from the fluid inlet and defines a vortex region between the inner peripheral wall of the chamber and the membrane surface and is adapted for receiving incoming fluid. In some constructions, the plurality of volume indicators may be positioned on the translucent portion of the side wall. In one aspect, the system maximizes the seal between a whole cell and the cell-contact surface of a patch clamp micropipette, maximizing the efficiency of a whole cell patch clamp recording. According to an embodiment, the TU size may be restricted to the minimum of PU width and height, except for a 2N\xd72N coding unit with the 2N\xd72N partition type.