High bays fall under Undertaking a commercial lighting upgrade (Activity 34) of the Commercial Lighting Upgrades category of the Victoria Energy Upgrade, formerly known as VEET Scheme for Victorian premises only. There is no upper limit to the number of LED high bays that can be installed at each commercial property.
Please note that LED high bays can only be installed to replace existing metal halide (old-fashioned) high bays, and cannot be installed into dimmable circuits.
Hardly a "deal"… $0 is the normal price available from numerous installers.