A backlit sign with an LED module, with a housing that includes a top wall having a first length, a bottom wall having a second length, and a pair of opposing sidewalls each having a third length, wherein at least a portion of one of the sidewalls is translucent. The fixture includes a base, an arrangement to locate a sheet to be supported on the fixture at a predetermined position relative to a plurality of datum points; and an arrangement to position an edge member to be secured along a peripheral edge of the sheet at a desired position relative to the datum points. The transmitter unit comprises a frequency generator that provides an operating frequency to the input of an amplifier stage, whose output is connected via a transformer to the transmitter coil. The anode compartment is separated from the cathode compartment by a lithium ion conductive membrane that is not permeable to sodium ions. Set on the axle, a support ensures the fastening of the end-plates of a series of double-acting actuating cylinders.