If this fitting requires installation, connection to the mains electrical supply, that installation must be performed by a licensed electrician in accordance with the wiring standard.
If this is a hardwired light fitting, and not specifically labelled “DIY” it must be installed by a licenced electrician.
OUTDOOR – if this is an outdoor fitting, it must be installed to the appropriate standard. Outdoor lights mounted on the wall or pillar will require the appropriate application of silicon sealant to ensure waterproofing.