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About Replacing a Ballast
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Magnetic Ballasts for Tubular Fluorescent Light Bulbs
These ballasts are often found in older installations. Ballasts that can operate multiple bulbs may have more wires than you need. Cover unused wires with a wire nut.
Preheat ballasts take several seconds to turn on and require a starter. Ballasts with a built-in starter are more efficient than other preheat ballasts.
Rapid-start ballasts have a slight turn-on delay, but are quicker than preheat ballasts.
Ballasts | Starters | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Bulb Trade No. | For No. of Bulbs | For Bulb Wattage | Voltage | No. of Wire Leads | Light Setting | Lg. | Wd. | Dp. | Min. Start Temp., °F | Specifications Met | Each | Each | ||
Preheat Start | ||||||||||||||
For Tubular T5 Bulbs | ||||||||||||||
| F4T5, F6T5, F8T5 | 1 | 4W, 6W, 8W | 120V | 2 | Not Dimmable | 3 1/8" | 1 3/8" | 1 7/8" | 50° | UL Listed | 00000000 | 00000 | 000000 | 00000 |
For Tubular T8 and T12 Bulbs | ||||||||||||||
| F15T8, F20T12 | 1 | 15W, 20W | 120V | 2 | Not Dimmable | 3 1/8" | 1 3/8" | 1 7/8" | 50° | UL Listed | 00000000 | 0000 | 000000 | 0000 |
Preheat Start with Built-In Starter | ||||||||||||||
For Tubular T8 and T12 Bulbs | ||||||||||||||
| F13T8, F14T12, F15T12, F15T8, F20T12 | 1 | 14W, 15W, 20W | 120V | 5 | Not Dimmable | 6 1/2" | 2" | 1 3/8" | 50° | UL Listed | 00000000 | 00000 | 000000 | 00 |
| F13T8, F15T12, F15T8, F20T12 | 2 | 15W, 20W | 120V | 8 | Not Dimmable | 6 1/2" | 2 3/8" | 1 1/2" | 50° | UL Listed | 00000000 | 00000 | 000000 | 00 |
Rapid Start | ||||||||||||||
For Circline T9 Bulbs | ||||||||||||||
| FC12T9, FC16T9 | 1 | 32W, 40W | 120V | 6 | Not Dimmable | 6 1/2" | 2" | 1 3/8" | 50° | UL Listed | 0000000 | 00000 | 000000 | 00 |
| FC6T9, FC8T9 | 1 | 20W, 22W | 120V | 6 | Not Dimmable | 6 1/2" | 2" | 1 3/8" | 50° | UL Listed | 0000000 | 00000 | 000000 | 00 |
For Tubular T12/VHO Bulbs | ||||||||||||||
| F48T12/VHO, F72T12/VHO | 1, 2 | 116W, 168W | 120V | 8 | Not Dimmable | 14 3/8" | 3 1/4" | 2 5/8" | -20° | UL Listed | 00000000 | 000000 | 000000 | 00 |
| F48T12/VHO, F72T12/VHO | 1, 2 | 116W, 168W | 277V | 8 | Not Dimmable | 14 3/8" | 3 1/4" | 2 5/8" | -20° | UL Listed | 00000000 | 000000 | 000000 | 00 |
| F72T12/VHO, F96T12/VHO | 2 | 168W, 215W | 120V | 8 | Not Dimmable | 14 3/8" | 3 1/4" | 2 5/8" | -20° | UL Listed | 00000000 | 000000 | 000000 | 00 |
| F72T12/VHO, F96T12/VHO | 2 | 168W, 215W | 277V | 8 | Not Dimmable | 14 3/8" | 3 1/4" | 2 5/8" | -20° | UL Listed | 00000000 | 000000 | 000000 | 00 |
Ballasts for Metal Halide Light Bulbs
Probe-start ballasts are often found in older installations.
Pulse-start ballasts turn on faster than probe start. They include a starter, which increases bulb life.
| For Bulb Wattage | Voltage | Ballast ANSI Number | Number of Wire Leads | Light Setting | Lg. | Wd. | Dp. | Mounting Hardware Included | Includes | Each | |
Magnetic Ballasts | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Probe Start | |||||||||||
| 175W | 120V/208V/240V/277V/480V | M57 | 7 | Not Dimmable | 4" | 2 7/8" | 4" | Yes | Capacitor | 00000000 | 000000 |
| 250W | 120V/208V/240V/277V/480V | M58 | 8 | Not Dimmable | 4 3/4" | 4 1/4" | 3 1/8" | Yes | Capacitor | 00000000 | 00000 |
| 400W | 120V/208V/240V/277V/480V | M59 | 8 | Not Dimmable | 4 3/4" | 4 1/4" | 4" | Yes | Capacitor | 00000000 | 00000 |
| 1,000W | 120V/208V/240V/277V/480V | M47 | 8 | Not Dimmable | 6" | 4 1/4" | 5 5/8" | Yes | Capacitor | 00000000 | 000000 |
| 1,500W | 120V/208V/240V/277V | M48 | 6 | Not Dimmable | 6" | 4 1/4" | 6 1/8" | Yes | Capacitor | 00000000 | 000000 |
Pulse Start | |||||||||||
| 50W | 120V/208V/240V/277V | M110 | 6 | Not Dimmable | 4" | 2 7/8" | 2 1/2" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 70W | 120V/208V/240V/277V | M98 | 6 | Not Dimmable | 4" | 2 7/8" | 3" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 100W | 120V/208V/240V/277V | M90 | 6 | Not Dimmable | 4" | 2 7/8" | 3" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 150W | 120V/208V/240V/277V | M81 | 6 | Not Dimmable | 4" | 2 7/8" | 3 3/4" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 320W | 120V/208V/240V/277V | M132, M154, M170 | 10 | Not Dimmable | 4 3/4" | 4 1/4" | 3 3/4" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 350W | 120V/208V/240V/277V | M131, M171 | 10 | Not Dimmable | 4 3/4" | 4 1/4" | 3 3/4" | Yes | Capacitor, Starter | 00000000 | 000000 |
| 400W | 120V/208V/240V/277V/480V | M135, M155 | 7 | Not Dimmable | 4 3/4" | 4 1/4" | 4 1/8" | Yes | Capacitor, Starter | 00000000 | 000000 |
Ballasts for High-Pressure Sodium Light Bulbs
| For Bulb Wattage | Voltage | Ballast ANSI No. | Number of Wire Leads | Light Setting | Lg. | Wd. | Dp. | Mounting Hardware Included | Includes | Each | |
Magnetic Ballasts | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 70W | 120V/208V/240V/277V | S62 | 6 | Not Dimmable | 4" | 2 7/8" | 2 7/8" | Yes | Capacitor, Starter | 00000000 | 000000 |
| 100W | 120V/208V/240V/277V | S54 | 6 | Not Dimmable | 4" | 2 7/8" | 3 1/2" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 150W | 120V/208V/240V/277V | S55 | 6 | Not Dimmable | 4" | 2 7/8" | 3 7/8" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 250W | 120V/208V/240V/277V/480V | S50 | 11 | Not Dimmable | 4 3/4" | 4 1/4" | 3 5/8" | Yes | Capacitor, Starter | 00000000 | 00000 |
| 400W | 120V/208V/240V/277V/480V | S51 | 11 | Not Dimmable | 4 3/4" | 4 1/4" | 4 3/8" | Yes | Capacitor, Starter | 00000000 | 000000 |
| 1,000W | 120V/208V/240V/277V/480V | S52 | 11 | Not Dimmable | 6" | 4 1/4" | 6" | Yes | Capacitor, Starter | 00000000 | 000000 |
Magnetic Ballasts for Plug-In
Compact Fluorescent Light Bulbs
These ballasts are often found in older installations. All are preheat ballasts so they take several seconds to start. They do not require a starter.
For Bulb | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shape | Base Type | For No. of Bulbs | For Bulb Wattage | Voltage | No. of Wire Leads | Light Setting | Lg. | Wd. | Dp. | Min. Start Temp., °F | Specifications Met | Each | |
Preheat Start | |||||||||||||
| Twin Tube | Two-Pin Wedge | 1 | 5W, 7W, 9W | 120V | 2 | Not Dimmable | 2 3/8" | 1 3/8" | 1 3/8" | 0° | UL Listed | 0000000 | 000000 |
| Twin Tube | Two-Pin Wedge | 1 | 13W, 18W | 120V | 2 | Not Dimmable | 3 1/8" | 1 1/2" | 1 7/8" | 32° | UL Listed | 0000000 | 0000 |
| Quad Tube | Two-Pin Wedge | 1 | 26W | 120V | 3 | Not Dimmable | 6 1/2" | 2 3/8" | 1 1/2" | 50° | UL Listed | 0000000 | 00000 |