That's when the ballast comes into function and automatically ... and the longevity (the average service life of a HID lamp is approximately 2,000 hours, while a Halogen lamp has between 450 ...

Abstract: This paper presents a single-stage, low-frequency, square-wave-driven electronic ballast for supplying high-intensity-discharge (HID) lamps with interleaved power-factor-corrections (PFC) ...

With such adjustable input impedance, the active and reactive power drawn from the ballast can be controlled. The power supplying to the LED lamp, and thus its brightness, can be adjusted ...

HID Electronic Ballast Garden Ballast HPS Light Ballast FOB Price: US 30-150 / Set Min.Order Quantity: 50 Set/Sets Supply Ability: 5000 Set/Sets per Month Port: Shanghai Place of Origin: Shanghai, ...