Standby lighting control for high intensity discharge lamp

Details Standby lighting control for high intensity discharge lamp Standby lighting control for high intensity discharge lamp

2006-04-25

2006-04-25

Vu, David (Department: 2828)

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

C362S236000

Reexamination Certificate

active

07034466

ABSTRACT:
A High-Intensity Discharge lamp which includes a high intensity discharge light disposed within the light cavity and a standby lighting control system including a light sensor for detecting a light intensity within the light cavity and a standby lamp which is supported within the lamp housing and is activated by the light sensor between a standby mode and a backup mode, wherein at the standby mode, when the light intensity of the high intensity discharge light within the light cavity is above a predetermined threshold, the standby lamp is deactivated, and at the backup mode, when the light intensity of the high intensity discharge light within the light cavity is dropped below the threshold, the standby lamp is activated for generating a backup light to compensate a loss of the light intensity of the high intensity discharge light.

REFERENCES:
patent: 4751398 (1988-06-01), Ertz, III
patent: 5526237 (1996-06-01), Davenport et al.

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