Electrical ballast is a device whose aim is limiting the amount of current that passes through a discharge lamp during the start-up. First, they provide the necessary voltage to start up the lamp and after that they limit the current. Lamps that use ballast are halogen lamps, fluorescent lamps and High Intensity Discharge lamps (HID).
A reduction in the energy consumption of 16% can be reached
With dimmable electronic ballasts, the intensity of light can be controlled and adjusted reaching an additional reduction in the energy consumption up to 70%
The typical flickering and the stroboscopic effect disappear because of their high frequency
Extend the lifetime of the lamps
One electronic ballast can substitute more than one magnetic ballast
Electronic ballasts have shorter lifetime than electromagnetic ones
Initial investment: medium. Around 30 euros/unit.
Payback: medium. More than 5 years.
References and best practices
CELMA Guide for the application of the Commission Regulation (EC) No. 245/2009 on “Tertiary lighting sector products: http://www.tridonic.com/com/en/download/CELMA_Ecodesign_1st_edition_Dec2009_full.pdf