High bays are designed to be used in very high areas (approximately 8m and greater) to provide well distributed and uniform light for open areas. The key element of the fitting which will help guarantee the correct light output is the reflectors and optics used by the fitting. A particular consideration for use with a high bay is if it can light vertical surfaces as well as it can illuminate the floor, or working plane. Lighting of verticals is particularly important when dealing with warehouses where items are required to be picked from a shelf. High Technology lightings preferred high bay solution is the Insignia INV. Usually an industrial lighting system having direct or semidirect luminaires located high above floor or work level.