The world's largest known deployment of lighting-based indoor positioning is finally going full speed ahead, as US retail giant Target plans to roll out a customer engagement system in nearly half of its 1800 stores by Christmas.

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　　Using Bluetooth chips embedded in LED ceiling lights from Acuity Brands, Target will send signals to shoppers' phones. Drawing on a Target app, the phones will display an interactive map that guides individuals around the aisles, helping them find specific items and providing information about discounts.

　　“This promises to make it easier than ever to find what you’re looking for, so you can fill up your cart and get on your way,” Target chief information and digital officer Mike McNamara said in a video blog on Target's website. “It'll even tell you if the product's on sale, so you never have to miss out on an opportunity to save.” He likened the system to driving a car using GPS.

　　Target has been piloting indoor positioning (IPS) for several years, as LEDs Magazine's sister publication Lux first reported exclusively back in April 2015.