Acuity (renamed from Acuity Brands in 2025) is North America's largest lighting company — it designs and builds the luminaires and lighting controls behind brands like Lithonia and Holophane — and is bolting on an Intelligent Spaces business (Distech building controls plus the Q-SYS / QSC audio-video platform it bought for $1.2B) to run whole buildings, not just light them.
From LED chip to lit building
Acuity buys LED chips, drivers and metal, builds them into fixtures and controls (Lithonia, Holophane, Distech, Q-SYS), and sells almost everything through independent agents and electrical distributors to commercial buildings — so it rarely touches the end customer directly.