High Efficacy

Efficacy is lumens divided by watts, and it is the figure that energy codes and lighting power density calculations are built on. A 200 lm/W strip delivers the same light as a 120 lm/W one for roughly 60% of the load, which can be the difference between a compliant design and a redesign.

It also compounds downstream. Lower load means smaller drivers, fewer circuits, less heat in the ceiling void, and a smaller contribution to cooling — the savings are not only on the lighting line of the bill.

Read the number in context. Efficacy is usually quoted at a specific drive current and ambient temperature; a strip run hot in an undersized profile will not deliver its datasheet figure, and neither will one driven at the top of its range.