Also try LED lighting
Natural daylight Solatube
Free daylight for dimly lit areas

Solarcrest offer a range of specialist daylight Solatube systems to domestic or commercial premises, either supply-only or supply and fit if part of a wider retrofit package. In the home a Solatube costs less to install than a Velux and gives a more uniform spread of light. In commercial premises with fluorescent lighting the capital repayment through energy saved is surprisingly fast. They'll also cut your Carbon footprint considerably if you have targets to meet or clients to impress.

Solarcrest are approved Solatube installers.