Two light level ballast

Details Two light level ballast Two light level ballast

H - Electricity

05

B

H05B 41/16 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2537911

A ballast (100) for powering at least one gas discharge lamp (30) at two selectable light levels includes a sensing transformer (120) and a detector circuit (200). Detector circuit (200) provides an output voltage that is dependent on the states of two on-off switches (S1,S2) interposed between the ballast (100) and a conventional AC source (20). The output voltage of the detector circuit (200) is used to control the illumination level of the lamp (30).

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