It is not specified in the Act who is responsible for supplying or replacing light bulbs.
Common industry practice is that the property manager/owner is responsible for maintaining specialised bulbs, and the tenant/resident is responsible for the replacement of everyday bulbs.
The tenant and property manager/owner should discuss this at the start of the tenancy and agree who is responsible for maintenance or replacement of light bulbs. This should be detailed in the tenancy agreement.
If changing a bulb requires specialist knowledge or specialist equipment, changing the bulb may be part of the property manager/owner’s responsibility to maintain the property.