Patent ID: 7265501

Claim:
A light that produces a high level of illumination without glare and that is capable of being powered by a DC voltage source, the light comprising: a high-intensity discharge (“HID”) lamp mounted within a housing, a lens mounted on the housing so as to enclose the lamp within the lens and housing, the lens being coated to diffuse light emitted from the lamp, a control circuit mounted within the housing and powered by the DC voltage, the control circuit comprising: a switching circuit for switching the DC voltage to derive an AC voltage from the switched DC voltage, a voltage multiplier circuit for multiplying the AC voltage's peak voltage to a level capable of igniting the lamp, the voltage multiplier circuit being a rectifier circuit that produces a DC output voltage that is a multiple of the AC peak voltage and that is applied to the lamp to maintain illumination of the lamp once the lamp is ignited, a timing circuit for generating interrupts, and a microprocessor for initiating ignition of the lamp and for monitoring the temperature and illumination level of the light and the level of the DC voltage source in response to receiving the interrupts from the timing circuit and compensating for improper measurements of the light temperature and illumination and the DC voltage source level by varying the frequency at which it switches the switching circuit, and thus, the voltage applied to the lamp.