Linked from
The 11 pages that link to Solar luminosity, each with the reason it gives.
Stellar luminosityBroader topic: It is the standard reference unit for comparing stars’ total power.
Solar constantRelated: Combined with Earth–Sun distance, luminosity determines the solar constant.
Solar massCompared with: It shares the Sun-based scale but measures power rather than mass.
Solar coreRelated: It measures the energy output that core fusion must sustain over time.