What is the temperature of ballast?

If the calibration point reaches its marked temperature, the maximum case temperature of the ballast is at 75˚C (the rated maximum). The ballast calibration point maximum temperature specification must not be exceeded.

What causes a ballast to overheat?

Any issue that causes excess voltage to run through the fluorescent bulb ballast leads to overheating, and incorrect wiring during the construction of the fixture or installation is one of the most common causes of this problem.

Do fluorescent ballasts get hot?

Overheating ballasts often exhibit symptoms. They may cause the bulb to flicker, shine, dim, or not work at all. Ballasts usually run hot, about 140 degrees F, but if one is so hot that you can’t keep your hands on it, it is likely the culprit.

Does a bad ballast burn out bulbs?

The ballast itself can go bad, which causes lights to flicker or even appear to be burnt out, when in fact they aren’t. They require maintenance and energy to power, on top of the power used to light the fluorescent bulb. They are a large part of the equation when using fluorescent lamps.

Why do fluorescent lights not work in damp weather?

Fluorescent bulbs use a hermetic seal, which means no humidity will penetrate the bulb itself. This seal is necessary to keep the toxic mercury vapor from leaking out into the environment. Humidity can cause corrosion of the metal fixtures on the ends of a fluorescent bulb, impeding its ability to transmit electricity.

Why do fluorescent lights not work in the cold?

Many fluorescent lights can’t operate if the air temperature is below 50 degrees Fahrenheit, which is not always due to the lights themselves but instead often has to do with the type of ballast used in the light fixture. Magnetic ballasts don’t work in cold temperatures.

How do I know if my ballast is working?

If the ballast is good, an analog multimeter has a needle that will sweep to the right across the measuring scale. If the ballast is bad, then the needle won’t move. If you’re using a digital multimeter, often the digital readout will possibly list a “1” when it doesn’t find a measurable resistance.

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