The ballast will often have a cover on it so get rid of the ballast cover working with a screwdriver and verify the ballast, which is typically a rectangular shaped grey or black box, to see whether it’s leaking oil or whether or not it looks burnt. Magnetic ballasts hum right from the box. Have a look at the diagrams on the old vs the new ballast and be certain you are likely to be OK.
When determining whether your fixture utilizes a starter, be certain to look underneath the bulbs… sometimes the bulbs have to be eliminated first to access the starter. Such a fixture is designed for use in high ceilings so this needs to be the very first consideration when shopping. Many fluorescent fixtures have more than 1 tube in order to supply more light.
When flickering is the matter, it’s still true that you must do exactly the same type of troubleshooting since all the very same issues that can lead to a lamp to never work may also cause flickering… defective starters, defective bulbs or a defective ballast. Lamps are far less expensive that a ballast, and besides, you don’t need to fret about lamps for a little while. HID lighting is easily the most efficient means to convert electricity into light which is available to the consumer. It’s the best sort of light to function as a key light source (if no or little all-natural sunlight is available).