Minimise LED luminaire cost

For retrofit residential LED bulbs, consumers are highly focused on cost almost to the exclusion of other parameters. Cost has fallen rapidly even from 3 years ago. A 40W or 60W equivalent bulb sells for ~ $5 from reputable manufacturers.

For retrofit industrial/commercial scenarios, cost is certainly not the primary driver in the industrial/commercial space. Cost is a piece of the ROI but not the only factor. Extensive computations and decisions on performance and life cycle costs must be included.