Yes it is fine, just order a longer extension cable if needed to get you to the start of your lights. If you are using our Standard cabling with moulded connectors, look at either the 6m SPT1 or 10m SPT3 extension cables. The extension lead should be the same type as your main cable i.e SPT1 10mtr 6007011 cable plus a SPT1 6mtr 6005011 extension cable. If you are using our SPT2 plain cable system, this is even easier as you can take the plain cable straight into the shed.
A recommended maximum cable length of 60-80mtr from the transformer to the last light.