How two change a bulb on the outside of a bailey caravan?

To change a bulb on the outside of a Bailey caravan, first ensure that the power is turned off to avoid any electrical hazards. Remove the lens cover by unscrewing or unclipping it, depending on the model. Take out the old bulb gently and replace it with a new one, ensuring it is securely fitted. Finally, reattach the lens cover and restore power to test the new bulb.