Wiring diagram of a simple Fluorescent light

We can wire up a simple fluorescent light all by ourselves without the need to buy the whole set which comes with some dull metal casings that we see in most homes. You can buy all the parts individually from most electrical shops. This is especially useful for aquarium covers where you can’t accommodate the full set.

Following the simple circuit diagram below you can actually place the ballast and the starter hidden somewhere away from the tube as long as you follow where the terminal goes.

Parts Of A Fluorescent Light

The fluorescent Light consists of 4 different crucial parts for it to work. Excluding the casing that holds these parts together, you can buy these fluorescent light parts individually then hook them up yourself.

You will need to buy:

  1. a pair of tube holders.
  2. a starter holder and a starter
  3. a ballast (20 watts for a 2 feet tube or 40 watts for a 4 feet tube)
  4. a fluorescent tube of your preferred wattage.

All these item are readily available in most electrical shops.

Fluorescent Light Wiring Diagram

After getting all the parts, you can now assemble the fluorescent light following the wiring diagram below.


The incoming supply can connected to a plug top plugged in to a switch socket nearby.

wiring-diagram-florescent light

Tips To Assembling A Fluorescent Light

As in all electrical installations, it is advisable to use different colored wires so you will not be confused as to which is the live wire and which is the neutral wire. Check out the fluorescent light wiring diagram above and see which wires goes where.

For a fluorescent light, the best practice and a general rule will be to hook the live wire to the ballast. It is not compulsory as even if you connect the neutral wire to the ballast, the fluorescent light will still work. However, this is not advisable and not a standard practice in wiring a fluorescent light. Doing it the standard way, make trouble shooting of the fluorescent light easier and safer.

Another matter to take note is to make sure all wire terminal connections are well tightened. Loose wire connections leads to sparking and increased heat which will roast the particular terminal after prolonged use. The most common places where you need to double check the wire connections are the tube holders, the starter holders and of course the ballast connections.

Safety Precautions When Assembling A Fluorescent Light

Though the process assembling a fluorescent light is very simple and straightforward, some safety precautions needs to be observed. Make it a habit when dealing when all electrical installations as electricity can kill.

The most important thing to always remember is to isolate all live supplies.. In short, always switch off the mains as you can never be sure. Take it a step further by sticking a notice in the main switch panel that some maintenance work is going on lest someone switch it back on unknowingly.

When you have completed your work, always clear up all leftover wire cuttings and double check to see everything is in place before switching back on the electricity supply.

Work smart, work safe and have fun assembling your fluorescent light.