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 Using the latest technology, Helvar has developed a new, slimline, high-frequency ballast range for T5, TC-L and T8 fluorescent lamps. The EL-sc is an ideal solution where not only energy-efficient but also cost-effective fluorescent lighting control is needed. The ballast has a profile of 21mm.