Every once in a while, the way that we see the world shifts and the way that we do things needs to be reviewed. The basic approach in commercial lighting, the sector from which so much lighting product derives, is the recessed fluorescent 600x600 modular luminaire. Designed to sit in a conventional suspended ceiling, this is the default lighting option for shops and offices everywhere.
Improved system efficiency in this type of fixture has relied on two things, one in the control of the manufacturer and the other not. The efficiency that the manufacturer has had nothing to do with, but has benefited enormously from, has been the improved light output of fluorescent lamps - to the general benefit of all users. The improved efficiency that has been less welcome, and which has been fully in the control of the manufacturer, has been the photometric performance of the luminaire.