Abstract: The disclosure herein describes a helicoidal system for securing a recessed light fixture assembly into an opening in a ceiling, wall or the like; the assembly comprises a light reflector having an upper collar and a light reflector support for mounting the light reflector into the opening of the ceiling, wall or the like. The light reflector support has an upper member that engages the upper part of the light reflector and has a helicoidal bearing surface to receive lugs provided on the light reflector whereby rotation of the light reflector, once received in the light reflector support, enables engagement in one rotational direction, and disengagement in an opposite rotational direction, of the light reflector to and from the reflector support.

Abstract: An electronic converter converts high-voltage AC power main voltage, such as 120V, 240V or 277V, to a low-voltage suitable for driving a halogen lamp. The converter includes a rectifier circuit, starter circuit, a driver circuit, a current sensing circuit and a transformer circuit with an optional synchronous output rectifier. The current sensing circuit senses an output current of the converter. The sensed current is used to govern pulse-width modulation of the lamp drive voltage, to provide over-voltage protection. Temperature protection can also be provided to reduce drive current when the converter overheats. This enables reliable operation of the converter over an extended temperature range, and reduces the occurrence of converter component failures due to ground faults or overheating.