Abstract: A spotlight comprises a base which is secured by nuts and washers to a support. There may be a single spotlight, or there may be a line of spotlights mounted on a support. Typical examples of use of the spotlight are illuminating displayed products such as jewellery, ceramics, clothes, or cosmetics. The locations may be retail stores, museums, or galleries for example. A main spotlight body is connected to the base by a joint having a bolt in a sleeve allowing rotation of about 180° around the bolt's axis. Further, the base can be secured to the support at any angular position about an axis through the base 2. Light emission is from an LED on a substrate, which is on an aluminium base, which has external threads engaging internal threads of a generally cylindrical casing. A focusing lens is mounted over the LED, and is retained in position by an inwardly-directed lip of the cylindrical casing.

Abstract: A display case luminaire (30) comprises a linear housing, array (32) of LED light sources, and lens (33), wherein the lens provides a substantially uniform spread of light across a target plane even if the luminaire is located to emit light generally at an acute angle to the plane. The lens (33) is a Fresnel lens and has non-uniform optical characteristics in cross-section, with at least two different focal lengths. The linear housing comprises a visor (36) and a reflective surface (35) externally of the lens and a reflective surface (35) between the lens and the light source. A display case luminaire as claimed in any preceding claim, wherein the housing is configured for mounting back-to-back with another similar luminaire to provide a field of emission in the range of 150° to 180°. The housing is generally quadrant-shaped in cross-section, and the lens may be tilted with respect to the light source.

Abstract: A luminaire drive circuit (1) comprises an AC to DC power supply (2) delivering DC power to rails (3), and a plurality of LED drive circuits (4) connected across the rails to receive DC power. Each LED drive circuit (4) comprises a plurality of LEDs (7) in series and a voltage and current controller (6) for controlling current through the LEDs and a voltage across the LEDs which is less than the voltage across the rails. In one example, each LED circuit (4) has a dedicated sensor (52) to detect proximity of an illuminated object. This allows control of illumination intensity both for energy efficiency and visual effect. The proximity sensor may be simply a photodiode (52) mounted to detect extent of light reflected from the objects (FIG. 5), thus avoiding need for a self-contained proximity sensor such as one of the ultrasonic type.