What is the power factor of a ballast?

What is the power factor of a ballast?

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. So how do you get that number? 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.

Is ballast factor the same as power factor?

Ballast Power Factor measures how “efficiently” a ballast uses its power. Expressed as a percentage, 0% to 100%, power factor is the ratio of power used by a ballast compared to the total power supplied by the utility: Power Factor = Watts/Volt-Amperes.

How much power does 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 does ballast factor affect wattage?

Ballast can add as much as 50-60 percent to the wattage of an LED light.

What is the power factor of lamp load?

Ideally, the power factor should be as close to unity as possible. A low value of the power factor increases the current load and the energy consumption. Most high-wattage lamp circuits are designed to have a power factor greater than 0.85.

How do you use a ballast factor?

Ballast factors are listed in the model specifications and range from 0.70 to 1.20. To use the equation, you multiply the lamp’s lumens rating by the fixture’s ballast factor. For example, if you’re using one with a factor of 0.95 with a 1,000 lumens lamp, you’ll have a brightness of 950 lumens.

What is the power factor of lamp load and why?

Resistive loads such as incandescent lamps have power factors of unity. A device is said to have high power factor (HPF) if the power factor is 0.9 or greater. Power factor between 0.5 and 0.9 is called normal power factor (NPF).

How much voltage does a ballast put out?

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).

Do ballasts draw power?

Newer electronic ballasts don’t draw energy unless a load is present.

Can you use a lower wattage ballast?

If the instantaneous voltage is the same, the same ballast should run a lower wattage lamp.

How do you calculate power factor?

It is found by multiplying (kVA = V x A). The result is expressed as kVA units. PF expresses the ratio of true power used in a circuit to the apparent power delivered to the circuit.

How do you calculate the power factor of a light?

The power factor is calculated by dividing the apparent power with the actual power. The power factor of an incandescent light bulb is 1, the apparent power and actual power are even. But the power factor of LED can be 0.3, for example.

How many volts come out of a ballast?

How do I know what size ballast I need?

By selecting a ballast with an ideal ballast factor, you can optimize the light output of your fluorescent lighting system and maximize your energy savings. To estimate your total system lumens, multiply the rated lumens of your lamp by the ballast factor. For example, 3200 lumens x 0.77 BF = 2464 total system lumens.

Does a ballast increase voltage?

Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output. Maintaining an optimum electrode temperature is the key to long lamp life.

What is the output voltage of a 120 volt ballast?


Input Voltage 120V
Input Current 0.80 to 1.65 A2
Ballast Type Electronic
Starting Method Rapid Start
Lamp Connection Series

What voltage does a ballast put out?

Do ballasts lose power?

Electrical ballasts lose energy due to heat loss. Ballasts limit electrical current in electrical devices such as fluorescent lights. However, they lose energy when they operate because of the way that they are constructed. Ballasts are basically copper wire in a coil shape that is wrapped around iron.

Can I use a higher wattage ballast?

But using a ballast rated for higher wattage is not necessarily over-driving, IMO. Using a higher wattage ballast on the lower wattage bulb is overdriving by definition It has to do with how the ballasts work. They do not produce output according to what bulb is attached. Ballast output is the same, no matter the bulb.

How efficient are HID ballasts?

The best automotive HID ballasts can reach efficiency levels of nearly 90%, with ASIC controllers and high-quality components. The average mid-range ballast is likely around 75-80% efficient, and your “eBay Special” $30 kit ballast will be around 60%.

What is the power factor of a ballast lamp?

Its power factor is typically around 0.5 which is poor. However, the increased current load can be compensated very easily by connecting a compensation capacitor in parallel to the ballast-lamp system.

What are the characteristics of a high power ballast?

The attractive features of the proposed ballast are high-power factor (> 0.99), low total harmonic distortion of input utility-line current (<; 10%), high efficiency (> 90%), cost-effectiveness and freedom from acoustic resonance. The operational principles, design guidelines and a design example are included in this paper.

What is a 35W CANbus HID ballast?

A 35watt canbus hid ballast doesn’t provide unnecessary heat to the bulbs and thus ensures, that they last for a long time. Do I need a Canbus Ballast? Canbus refers to the electric system in your car that allows communication between different devices and components of the vehicle without a host computer.