How to Change a Bulb
There are many types of bulbs available, but they all have one of the two fitting attachments;1. Bayonet fitting
This is perhaps the most well known bulb fitting in the world. Invented towards the end of the nineteenth century and utilising a mechanism originally developed for bayonet rifles, the bayonet fitting consists of a spring and two contacts with bayonet mounts on either side. To fit, simply depress the lamp into its holder, twist under the lugs and the bayonet mounts are retained by the springs, thus ensuring optimum contact - the simple push and twist most of us are familiar with.
2. Screw fitting
Using the metal screw as one contact and a single base as the other, the lamp simply screws into the fitting. Contact is made when the lamp screw is almost home, thus making the screw part both the physical and electrical contact that makes the circuit.
Be sure you know which one to buy when you go shopping. For rooms where good strong light is needed (kitchens) fluorescent tube lighting is the best.
HOW TO CHANGE A BULB
- Switch off the mains switch on the distribution board or electricity dispenser.
- Switch off the light at the light switch or wall socket.
- Note: If a lamp's bulb is to be changed, switch off the lamp switch and remove the plug from the wall socket.
- Remove the faulty bulb. If the bulb is a bayonet type, insert it carefully into the light socket, and twist it gently until the bayonet pins slot into place. If the bulb is a screw-in type, insert it carefully into the light socket and turn it clock-wise until it sits firmly in the light socket.
- Switch on the mains switch on the distribution board or electricity dispenser and then switch the light on.
- Discard the old light bulb safely.