How do you know if a fluorescent bulb is good?

Set a multimeter to the ohm (Omega symbol) setting, then touch one tester probe to each of the pins at the end of the bulb. If the tester shows a reading between 0.5 and 1.2 ohms, the bulb has continuity. Repeat the test at the other end of the bulb.Click to see full answer. Likewise, how can you tell if a fluorescent bulb is bad? Check the ends of the tube. If they appear darkened this indicates the bulb is burned out. Rotate the tube in the fixture if the bulb is not darkened on either end. Remove the bulb from the fixture if the bulb is still not illuminating. Secondly, how do you test a fluorescent starter? How to Test Fluorescent Starters Turn the power off. Starters correspond to the wattage of the fluorescent bulbs they run. Remove the old starter by pressing in and turning it counterclockwise. Replace the new starter in the socket by pressing inward and turning clockwise. In respect to this, how do I know if my tube light is working? Test the electrodes using a multimeter. If the electrodes are not intact, the bulb will not have a current running through it. Place the probes on both pins of the tube light to get an accurate reading. If there is no reading on the multimeter, the bulbs should be replaced.How much does a ballast cost?A replacement ballast costs about $10-25 depending on capacity and brand. The bite is that an electrician trip charge (which includes 30 or 60 minutes work) is going to be $75-150 probably – for about 5 minutes work on each light fixture.