Ballast offers from Amazon.com

Full daylight spectrum incandescent grow bulbs. Bulbs can be used in any fixture. One year warranty.
Price: $9.50 [Notify me when price goes down.]

6-sided motion-activated hanging coach-style porch light. For economical and convenient porch illumination. 150 degree motion sensor with up to 30-feet detection range and adjustable sensitivity. Two-level lighting: timed, low-level accent light or full-bright security light.
Price: $59.83 [Notify me when price goes down.]

RACK BALLAST OPTION KIT 91XX 10XXX RACKS.
Price: $179.00 [Notify me when price goes down.]

48"L x 12"W x 3"H. 120 volts. GESB ballast-commercial electronic ballast/approved for residential use. Uses 2-48" T8 lamps (not included).
Price: $51.36 [Notify me when price goes down.]

WALL SWITCH. Turns lights on & off. automatically. Easy two wire installation.
Price: $14.40 [Notify me when price goes down.]

MagMount quick connect. Unique refillable, reusable, universally available bladder (sandwich bag). Stabilize small cameras & optics. Doubles as a belt bag when bladder is removed.
Price: $29.99 [Notify me when price goes down.]

High quality track ballast used to hold ties in place. Also great for modeling gravel roads. Mix and match various colors for a realistic effect. Attach with Scenic Cement (WOOS191).
Price: $5.34 [Notify me when price goes down.]

Fully assembled and ready for your layout. Upgraded former MDC tooling. Upgrades include new wire and plastic handrails, stirrup steps, ladders, roping eyes and underbody detail. Removable cast ballast load.
Price: $46.72 [Notify me when price goes down.]

High quality track ballast used to hold ties in place. Also great for modeling gravel roads. Mix and match various colors for a realistic effect. Attach with Scenic Cement (WOOS191).
Price: $2.50 [Notify me when price goes down.]

# ISO 9001:2000, E-Mark Certified. 2 x Ultra Durable Ballasts from German technology (Shock and Water Proof) ,2 x Xenon Bulbs Japan Made ,Smart ballast will not trigger any headlight warning signal.. More than 3 times brighter than halogen bulbs,All necessary installation hardware (Mouting bracket, bolts, nuts, and tapes),Instruction manual,EASY Installation. Less than 30 minutes.. Available in H1, H3, H4, H7,H8, H9, H10, H11, H13 9004, 9005, 9006, 9007, 880 881 D1R/S/C D2R/S/C. 1 Year Factory Hassle Free Warranty..
Price: $95.00 [Notify me when price goes down.]