What are the 4 ballast types?
Types of fluorescent ballasts
- Rapid start ballasts work kind of like preheating an oven.
- Programmed start ballasts are typically paired with occupancy or motion sensors.
- Probe start ballasts are the older type and not very easy on the HID lamp.
- Pulse start ballasts don’t use a starting probe electrode.
What do the letters on a ballast mean?
The most common types are T12, T8, and T5. The T stands for tubular and the number indicates the diameter in 1/8 of an inch. Lamp diameter is determined by ballast type. A fixture with a T12 ballast must use a T12 bulb. A fixture with a T8 ballast must use a T8 bulb, etc.
What does the T stand for in ballast?
About Advance Ballasts and Fluorescent Lamps. Advance Ballasts that utilize fluorescent lamps usually come in two shapes, straight and u-shaped. Most fluorescent types are T5, T8, and T12. The T stands for tubular and the number provides the diameter in 1/8 of an inch. Lamp diameter is determined by ballast type.
How do I know what ballast I have?
Simply turn the light on, then take a photo of the fixture using your smartphone or digital camera. If there are no dark bands on the resulting image, you have an electronic ballast that will work with direct drop-in LED tubes.
How do I know what ballast I need?
When purchasing a ballast, you’ll need to read the type of lamps it’s designed for, how many lamps it operates, and the voltage the lamps will run on. Choosing the right ballast for a lamp will optimize the light output and life of the bulb.
How do you wire a 4 light ballast to a 3 light fixture?
The two yellow wires on a 4 lamp instant start ballast are connected together inside the ballast.
- Cut and cap one yellow and one red or blue wire with a wire nut.
- Connect each of the blue ballast wires to the each of the two blue lampholder wires.
- Connect the red ballast wire to the third blue lampholder wire.
How do I know what type of ballast I have?