What separates one from another is the profile height, the lumen output and the mounting surface. A 0.7 inch edge-lit panel clears a shallow joist bay that a 3 inch wrap will not. A flush mount with a cast housing looks right in a hallway and a utility-grade wrap belongs in a mechanical room. Wet and damp ratings decide whether the same fixture can go on a porch.
This group includes flush mounts, edge-lit and back-lit panels, ceiling wraps, linear surface strips and puck lights, in round, square and rectangular formats, from 5 watts to several hundred. Several families offer 5CCT or 3CCT selection plus wattage selection at the switch, which cuts the number of SKUs needed to cover one job.