No. LED bulbs have been designed to retrofit existing fittings. You should double-check the dimensions of the new bulbs just to make sure that the particular product will be the correct size for your existing fittings. You can check the dimensions of our lamps on our website. In order to ensure the longevity of an LED bulb it is recommended to change transformers over to specialist LED drivers.← Do I need to replace my fittings to use LED bulbs?