OPT7 Blitz 35w Replacement HID Power Ballast Only - Single Unit for Xenon Conversion Kits REPLACEMENT BALLASTS ONLY: Requires HID Bulbs (sold separately) to complete kit Blitz 35w Series Ballast: Super bright 3,100 Lm power, reduced flickering with non-cycling technology, and a durable waterproof case Easy to Use Plug-and Play with QuickSnap connectors. Can be used with any OPT7 BLITZ Bulbs. Includes: One (1) OPT7 Blitz 35w HID Power Ballast