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You will need one ballast per light. With 2 bulbs you will need 2 ballasts. Feel free to let us know if you have any further questions!
If you have any other questions just let us know. Thanks!
Yes all of the Hamilton ballasts have a 1 year warranty from the date of purchase.
Assembled 250W Replacement Electronic ballast from Hamilton Technology.
- Adjustable - 125W / 190W / 250W / 275W
- Aluminum enclosure
- Energy efficient, runs cooler than standard magnetic ballast
- Quiet operation
- Compatible with any 250W Metal Halide bulb
- UL Listed
- Includes: 3-prong quick disconnect and 7 Ft grounded power cord
- Dimensions: L10" x W4.5" x H3.25"