BMW Motorsport racing at the recent Nurburgring 24hr endurance race were given adaptable pit garage luminaires and specially designed glasses incorporating coloured LED's in the arms. It has long been known that cool, blue-hued light stimulates us and so drivers were given the blue LED glasses before each stint. In the time leading up to the change-overs, drivers who would be racing next would wear the glasses to make them more alert.
Drivers who had finished their stint would then wear glasses with red LED's to encourage them to rest and sleep, being given the blue again after waking and before the next stint. Lighting within the garage areas would also be tuned to shift, aiding both concentration and rest.