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NESA's Technical Energy Advisory Service Methods Described by Means of Classroom Lighting Examples Ib Winther Evers Energy Consultant NESA AS, Denmark Abstract This paper describes the methods that are used by NESA's Technical Energy Advisory Service to obtain retrofittings of lighting installations that are good from a lighting engineering point of view and are profitable as to energy. To be able to fix possible energy savings it is necessary to know the annual operating hours of the individual installations. If these operating hours are not known they have to be determined by means of measurements before the energy savings can be calculated. Taking the operating hours into account proposals for new installations will be prepared. The energy savings that can be obtained when using good lamps, ballasts, fixtures, fixture locations and controls in a financially beneficial way will be incorporated in the proposal. The individual initiatives will be given priority according to costs in proportion to saved energy. Only rarely is it possible to use all possibilities at the same time. It is necessary that the right solution is chosen according to the customer's need. Back to Right Light Proceedings startpage Top of page