Our ceiling plates that have just light flex hanging down can hold a maximum of 2kg i.e. the maximum weight tolerance of the light flex.
Our Single Ceiling Hooks can hang, using a piece of our large chain, a light fitting up to max of 5kg. If you had 2 hooks and chains you could hang 10kg and with one of our large triple hooks and large chain up to a maximum of 15kg. Obviously the fixing into the ceiling also needs to be secure. You can add one of our wooden pattresses which can be secured using larger screws. If you fix into a ceiling joist this can also add extra hold but you will need to consult a builder.
If in any doubt please always refer to a qualified electrician. All work undertaken should be signed off by a qualified electrician to make sure it is safe.