Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should contact Chris Bond on 020 75056816 New research from the Institute of Energy & Sustainable Development at De Montfort University has revealed that rooflights save energy - by reducing the need for artificial light and providing passive solar gain. For more information call Brett Martin Daylight Systems on 0845 6088 999.