That's a cassette style veg system for vertical trellis panels. In a 5' wide by 10' long space, I can place 6 panels, each with one plant. Each panel then goes into flower in a different space (yes, they're easily transportable!) where the panels get fully lit front and back.
Each panel is 6' tall by 4' wide so both sides is 48ft².
So that 50ft² veg cassette footprint is effectively vegging... 288ft² of canopy.
That's space utilisation. And it's all within reach of people standing on the floor, no scissor lift silliness required.