Ballast factor is a number normally between 0.70 and 1.2. This number is a multiplier applied to the rated initial lumens of a fluorscent or HID light bulb. The result tells you how many lumens are actually delivered from the bulb-ballast system.
What is ballast factor?
A ballast factor is a number, typically between 0.70 and 1.2, that tells you how much light a lamp will emit with that ballast. … Ballast factor is calculated by dividing the lumen output of a lamp-ballast combination by the lumen output of the same lamp(s) on a reference ballast.
What is a high power factor ballast?
A high power ballast is one that delivers current to the fluorescent lamp in a more energy efficient manner than a lower power ballast.
What do ballast numbers mean?
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. … Therefore, a T12 ballast must use a T12 bulb.How do I choose a ballast?
It needs to fit the electrical requirements of the lamp that it will run. 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 many watts does a ballast use?
They consume eight to 10 watts when operating with the lamp in the circuit. The ballast will consume about four watts when the lamps are removed although the ballast is still energized. Electronic ballasts start and regulate fluorescent lamps with the use of electronic components.
What is the use of electronic ballast?
An electronic ballast (or electrical ballast) is a device that controls the starting voltage and the operating currents of lighting devices. It does this through the principle of electrical gas discharge.
How do I know if I have a T8 or T12 ballast?
If no markings are available, the size in diameter of the tube is the easiest way to determine the type you have installed. T8 tubes are 1-inch in diameter and T12 tubes are 1 1/2 -inch.What is the output voltage of an electronic ballast?
Newer fluorescent ballasts are usually rated for both 120 volts and 277 volts. Some are rated for only 120 volts, others for only 277 volts (used in commercial environments). CFLs for the home have a built-in ballast at the base of the bulb.
What happens if you use wrong ballast?If you use a wrong sized ballast the LRC will not be tuned so you are likely to not start the lamp at all. There is the possibility of burning out components pre-maturely also due to overcurrent and overvoltage conditions particularly if using a larger ballast on a smaller fixture.
Article first time published onWhat is power factor of fluorescent lamp?
Power factor between 0.5 and 0.9 is called normal power factor (NPF). Mag- netic and electronic ballasts for fluorescent lamps may be either HPF or NPF. HPF bal- lasts usually have filters to reduce harmonics and capacitors to reduce phase displacement.
What is a preheat ballast?
Preheat Operation Lamp electrodes are heated prior to initiating the discharge. … Ballasts for instant start lamps are designed to provide a relatively high starting voltage (with respect to preheat and rapid start lamps) to initiate the discharge across the unheated electrodes.
Why PF is low of tube circuit?
The combination of the inductance of the ballast and the resistance of the ionized gas in the tube causes the power factor to lag.
What is a Class P ballast?
Class P: A ballast for a fluorescent lamp which meets the requirements of the Underwriters’ Laboratories, Inc.; includes an automatic resetting thermal protector to remove the ballast from the circuit if its temperature exceeds a specified value. 4. Same as constant-wattage ballast.
What is the difference between magnetic and electronic ballast?
A magnetic ballast uses coiled wire and creates magnetic fields to transform voltage. … An electronic ballast uses solid state components to transform voltage. It also changes the frequency of the power from 60 HZ to 20,000 HZ or higher depending on the ballast.
Will a T8 work in a T12 fixture?
T8 tubes are simply 1 inch in diameter versus the 1.5 inch diameter of T12 tubes. In an effort to make LED tube lights compatible with the internal dimensions of most fixtures, you will find that most LED tube lights feature a T8 or 1 inch diameter. They can indeed be used in T12 fixtures.
Which ballast is used in sodium lamp?
Ballast TypeSodium Vapor BallastVoltage240 VBrandNikkonModelHPS 1000WStart MethodInstant Start
What is inside a ballast?
They’re usually rectangular black boxes with wires coming out of one or both ends. Lighting ballasts for fluorescent light bulbs and HID lamps made before 1980 may contain polychlorinated biphenyls (PCBs). … Fortunately, you can easily tell whether a ballast contains PCBs.
Which is not the advantage of electronic ballast?
Electronic ballasts are more efficient and more compact in size and weight. They also provide the ability for continuous power adjustment at different settings. A disadvantage is that power fluctuations may cause a failure but this can be offset by adding a buffer capacitor. Operation of the ballasts generate heat.
How much power does an electronic ballast use?
Electronic Ballasts On a typical fixture with two 4 foot 40 watt T-12 fluorescent lamps, the ballast consumes about 13 to 16 watts of electricity. Thus the total consumption of the two lamps plus the ballast is about 93 to 96 watts. The most efficient ballasts are electronic, or high-frequency ballasts.
How many amps does a ballast draw?
Generally, most standard outlets have a capacity of 15 amps. When you plug a 1000 watt ballast in your 110 volts power supply, it draws nine amps.
Can you use a higher wattage ballast?
No, the socket is designed to only take a certain amount of current. If you put an 18 watt bulb in you will overload the socket, risk it over heating and can be dangerous. There is a reason that the ballast has a watt rating. It is the only thing that limits the current in the fluorescent tube.
How do you check voltage on a ballast?
Test the ballast’s voltage with a multimeter. Attach the multimeter’s leads to the sockets at the ends of the ballast. If the reading is not between five and nine volts, replace the ballast. Adjust the multimeter to measure frequency and replace the ballast if the reading is not between 20 and 50 kilohertz.
Does a ballast increase voltage?
Without a ballast to limit its current, a fluorescent lamp connected directly to a high voltage power source would rapidly and uncontrollably increase its current draw. … Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output.
What is the output voltage of a T5 ballast?
Ballasts for T5 lamps are available for 120-, 277-, 240-, and 347-volt operations. Most T5 ballasts are more compact than T8 ballasts, although the dimensions vary depending on manufacturer and lamp type.
Are T8 and T12 ballast interchangeable?
T12 primarily run off a magnetic ballasts and T8 bulbs operate on electronic ballasts. … So the bottom line is that these are not interchangeable and if you’re going to upgrade from a T12 to a T8 bulb, then you also have to change out the ballast.
What does T8 and T12 mean?
A T12 lamp (on the left in the figure below) is therefore twelve-eighths of an inch, or one-and-one-half inches (3.81 cm), in diameter. A T8 lamp (on the right in the figure below) is eight-eighths of an inch, or one inch (2.54 cm), in diameter.
What is electromagnetic ballast?
Electromagnetic Ballast (Magnetic Ballast) LIGHTING: A ballast used with discharge lamps that consists primarily of transformer-like copper windings on a steel or iron core.
Are there different types of ballasts?
And there are two types of ballasts in each family: magnetic and electronic. Magnetic ballasts are the older ballast technology. … For HIDs, some metal halides and HPS lamps use magnetic ballasts. Magnetic ballasts are typically the culprit for buzzing and flickering because they regulate electricity incrementally.
What to do with the yellow wires on a ballast?
The two yellow wires complete the circuit through the fluorescent tube back into the ballast. The red and blue wires energize the pins the fluorescent tube is attached to, the yellow wires connect to the pins on the opposite ends of the fluorescent light tubes completing the circuit.
What is the power factor formula?
The power factor is the cosine of the phase difference between voltage and current, and as a result, the power factor is measured using the formula Power Factor = cosɸ, where ɸ is the phase difference between the voltage and current phasor.
