Fluorescent fixtures all contain ballasts, which will be one of two types: electronic or magnetic. If you're not sure which type of ballast is incorporated in a light fitting, listen for a faint buzzing, or look for a flickering in the light. If you can see or hear this, then it is likely to be a magnetic ballast. Alternatively, take a picture of the light (while it is on) with your smartphone. If the resulting image has black bars or stripes across it, then the light contains a magnetic ballast. If the image is clear, then it is an electronic ballast.
If the fitting contains an electronic ballast, you must remove it to prevent damage to the LED tube. Disconnect the wires from the ballast unit. Remove the unit and connect the loose wires to form a circuit. Ensure the connections are secure and insulated
Depending on the fixture and the tube, you will either need to remove or bypass a magnetic ballast entirely, or just remove the starter (a small unit within the fitting that looks a little like a cylindrical 9-volt battery). Many LED tubes are packaged with an LED starter to make installation easier. However, if you need or wish to bypass the ballast, we'd advise you to consult a professional electrician.
How to install a LED Tube in an existing installation?
With these handy examples you can easily replace an old fluorescent fluorescent tube for an LED tube in a fixture (with or without a conventional ballast).
Do a favor for both the environment and your wallet - there's many benefits when switching to LED:
Long life - LED tubes have an extra long lifetime of between 30,000 to 50,000 hours which means it last for 15 years in the average office environment. Choosing LED means that you don't need to buy new tubes every now and then. Furthermore, you significantly decrease your maintenance costs.
Energy efficient - LED-tubes use less less energy compared to traditional tubes. There are LED replacers that use as little as around 8W compared to traditional ones of 58W. With LED-tubes you will have an initial cost which soon will be covered by the decrease of your energy bills!
Eco-friendly - LED tubes doesn't contain any environmental toxins compared to old tubes that contain mercury. LED tubes can be recycled and they consume much less energy which contributes to a greener planet!
Resistant - LED-tubes are more resitant than traditional tubes that are made of glas. LED-tubes are normally made of a very resistant plastic called polycarbonate.