Electrical companies in London, UK

Switch off the lights, remove the spring and the old light bulb. Check the voltage, wattage and the type of pins connection. In the picture below you can see the two main types of pins connection for downlighters.

Check that your new light bulb is of the correct cap type. If the lamp holder is damaged, seek the advice of a qualified electrician.

Push the light bulb inside the light socket and refit the metal spring back into the light socket. The role of the metal spring is to hold the light bulb in place.