For Cadillac For Escalade 6.0L ELECTRIC/FLEX V8 Automatic For Hybrid 2010 2011 2012 2013 For Cadillac For Escalade 6.0L ELECTRIC/FLEX V8 Automatic For Hybrid Platinum 2010 2011 2012 2013 For Cadillac For Escalade 6.0L ELECTRIC/GAS V8 Automatic For Hybrid 2009-2009 The ballast can provide a stable voltage and current to the light during its activation. If there is no ballast, the lamp will consume too much electricity, causing it to quickly turn off. Ballasts can prevent this from happening and ensure that you fully utilize the lifespan of the light bulb.  The ballast plays a crucial role in controlling the lighting output of the bulb, providing efficient and stable illumination, thereby enhancing visibility during nighttime driving and improving driving safety., Manufacturer: TjOta