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Model # GEM220TS120DIY

Internet # 203978176

Store SKU # 667336

Magnetic Trigger-Start Ballast for T12 and T8 Lamp

This item has been discontinued.
The Home Depot no longer carries this specific product.

$15.99 /each


Model # GEM220TS120DIY

Internet # 203978176

Store SKU # 667336

The GE Magnetic Trigger-Start Ballast for T12 and T8 Lamps features series wiring and is durably built from metal. Its design helps extend the life of lamps subjected to frequent switching. It runs at 120-Volt.

  • Use with lamp types: F15T8, F15T12, F20T12
  • For use with fixtures that contain 2 lamps
  • Thermally protected
  • Minimum starting Temp 50 degrees F

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Accessory Type 
Replacement Ballast 
Color Family 
Input Volts 
Number in Pack 
Number of Lamps 
Product Weight (lb.) 
2.75 lb 
Required bulb type 
Starting Method 
Rapid Start 
Warranty / Certifications
Certifications and Listings 
1-UL Listed,CSA Listed,ETL Listed 
Manufacturer Warranty 
GE Lighting warrants to the purchaser that each ballast will be free from defects in material or workmanship for period of 2 years from the date of manufacture when properly installed and under normal conditions of use. 


Rated 4.0 out of 5 by 7 reviewers.
Rated 1.0 out of 5.0 by Chinese Junk. Give these a pass and try the Philips or any other brand. This is the second batch that I have installed for my walkin closet. They work fine for a month then start buzzing when starting up. Eventually one lamp in each fixture stopped working. Give these a pass and try the Philips or any other brand. Chinese Junk June 21, 2015
Rated 3.0 out of 5.0 by Caution Use caution when selecting - text description says you can use 34 or 40 watt lamps (T12). However, label on product photo clearly indicates only lower wattage lamps. Did not order, as unsure what I'd really receive. March 25, 2015
Rated 5.0 out of 5.0 by Worked as expected Amazed at how much lighter it was than the original. Installation took just a couple of minutes. February 25, 2015
Rated 5.0 out of 5.0 by Don't toss your old fixtures just yet With the phase out of the older style fluorescent bulbs in place I bought a few of these as I have many fixtures and bulbs already on hand. The electronic start makes the old ones that were slow and cranky in cold weather work like new. I had a few ballasts they just needed replacing too as they were not operating. Inevitably I will need to change over to skinnier bulbs but these are a great stopgap for the present future. September 16, 2014
Rated 5.0 out of 5.0 by Easy install Quick install. Appreciated that the wires were pre-stripped May 27, 2014
Rated 5.0 out of 5.0 by good quality product Once you have some basic training in electrical wiring the schematics are very easy to read. Replacement and installation is a breeze. May 13, 2014
Rated 4.0 out of 5.0 by Works with some flicker on startup The price and availibilty was right. I needed two of them for the fixture I was repairing. This is the second time I have had the ballasts go bad in a fixture. This tie I replaced them instead of the fixture. Other than not being instant on the do turn on in about a second with some flicker of the light. These are the old magnetic style ballasts. November 5, 2013
  • 2015-07-31T12:08:09.207-05:00
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