problem is this is a grey area.
It’s def not a contents insurance claim because it’s a fixture and so if it’s an insurance claim it would be on the strata building insurance. As the Strata insurance has an excess ($250 maybe) this would be payable by the yourself (as the item is not common property).
You may have a claim against the Strata for negligence but that is a bit thin and unless they accept this you will have a uphill battle.
I belive the Strata insurance should pay for the repair to the fan / light except for the excess which is your cost.