Lighting can be an area for large gains in energy efficiency. On investigation, some offices may find they can replace lighting technology with alternatives that use 82 per cent less electricity. Like any business project, the larger your enterprise the more there is to consider and lighting changes need to still ensure appropriate light levels for the tasks undertaken. Typically, an upgrade will involve identification of strategies and technologies and a business case for the upgrade. There are several tailored financing schemes can also help improve the investment returns on lighting. As many tenancies are over-lit, a lighting audit may also identify opportunities to reduce the number of light fittings or make better use of daylight.