A backlight device for a liquid crystal display has a lamp and a lamp holder surrounding the lamp. The lamp holder is made of a conductive material to play the role of a cable and has one end thereof implemented as a socket capable of mating with a base provided on the lamp. The lamp can be replaced easily without resorting to troublesome manipulation.

A xenon arc search lamp has a lamp beam focused by relative movement of a reflector by advancing or retracting it along its optical axis of symmetry on which the lamp is aligned. The battery and lamp assemblies are field replaceable without tools. The beam output is usable with a combination of filters to allow the most varied intensity and wavelengths for a particular application, such as smoke filled environments, infrared illuminations and underwater illuminations. The xenon arc lamp is oriented within the searchlight with respect to the reflector to provide the most uniform field of illumination on which the lamp is capable, namely with the anode of the lamp turned away from the forward beam direction in the reflector.

An emergency light system adapted to be powered by a vehicle wet cell battery that includes a rectangular shaped snap on system housing member that has a battery top receiving compartment formed therein, first and second terminal receiving members extending into the battery top receiving compartment and two snap connectors for snap connecting the system housing member to a vehicle wet cell battery, the first and second terminal receiving members each having a cylindrical shaped terminal receiving cavity formed therein sized to receive a battery terminal of a vehicle wet cell battery and having a spring biased electrical contact positioned therein, each spring biased electrical contact including an electrically conducting biasing spring and a contact member attached to a moveable end of the biasing spring; a rectangular shaped bulb housing positioned on top of the system housing member and defining a lamp compartment in connection with a rectangular diffuser lens opening, the rectangular shaped bulb housing including air vent openings formed through a sidewall thereof and into airflow connection with the lamp compartment; a lamp diffuser lens covering the rectangular diffuser lens opening of the bulb housing member; an on/off switch; and a lamp socket mounted within the rectangular lamp compartment; the lamp socket being wired in series with the on/off switch and between the contact members of the spring biased electrical contacts positioned within the cylindrical shaped terminal receiving cavities of the first and second terminal receiving members.

A portable battery powered high intensity lighting system that produces solar quality illumination at four to six times the efficiency of comparable incandescent lighting systems includes a light head and a power source. The light head contains an HID (high intensity discharge) arc lamp. A sealed enclosure containing a ballast is attached immediately adjacent to the lamp assembly. The ballast enclosure is preferably potted with a thermally conductive epoxy.

An illuminating service for creating a broad area of illumination is preferably enclosed in a compact and hand held housing, and includes an illumination source consisting of a bulb and a reflector. The illumination source is directly connected to a moving means using an attachment means, and is rotated at a frequency to provide an increased area of illumination having an intensity perceived as being substantially equivalent to that of a non-rotating beam when viewed by an observer. In addition, an energy reuse and DC notching reducer are disclosed that includes a load member and an energy storage means that are operatively connected with a pair of switches. The switches are selectively energized as to allow current to pass through the load member and to allow the energy storage means to store and discharge energy such that the energy is recycled through the load member.