Licensing Agreement

Dialight PLC 20 June 2006 Date: Immediate release, Tuesday 20 June 2006 Contacts: Roy Burton - Group Chief Executive Cathy Buckley - Finance Director Dialight plc Tel: +44 (0) 1480 447490 Alistair Mackinnon-Musson Nicola Savage Hudson Sandler (PR to Dialight plc) Tel: +44 (0) 20 7796 4133 Email: dialight@hspr.com DIALIGHT PLC LICENSING AGREEMENT SIGNED WITH COLOR KINETICS Dialight Subsidiary licenses Color Kinetics' patent portfolio to advance market adoption of LED color mixing technology Dialight plc (FTSE: DIA.L) the UK listed leader in Applied LED Technology today announces that its US subsidiary, Dialight Corporation, will license Color Kinetics' worldwide patent portfolio to support the accelerated development of Dialight's LED application initiatives in the architectural, entertainment and general illumination markets. The worldwide licence applies to sales in all markets covered by Color Kinetics' patent portfolio. The agreement also provides Color Kinetics with access to Dialight's patents as they may relate to enhancements to Color Kinetics' technology. Dialight Corporation specialises in the application of LED-based lighting technology and has a broad range of expertise that enables its OEM partners to develop complete LED-based lighting solutions. Through its agreement with Color Kinetics, Dialight Corporation will now be able to offer its partners the unique features that are covered by Color Kinetics' patents - complementing Dialight's own SpectraMix(R) control system and associated intellectual property. Roy Burton, Group Chief Executive of Dialight said: 'Following the acquisition of Lumidrives by Dialight plc in January 2006, to take us into the European solid-state lighting market, we view the Dialight Corporation agreement with Color Kinetics as an important next step in driving forward our initiatives in the North American market for Solid State Lighting in architectural, entertainment and general lighting applications. We also believe this agreement will be a major factor in stimulating the adoption of LED technology by our OEM lighting fixture partners.' Bill Sims, President and CEO of Color Kinetics added: 'We're very pleased to support Dialight Corporation in its plans to enter new markets with intelligent LED lighting offerings. We believe there are many market opportunities for this technology that will continue to grow through third-party product development. Our mission, in part, is to fuel that growth through licensing relationships built on our strong intellectual property.' - ENDS - Notes To Editors: About Dialight plc Dialight plc (FTSE: DIA.L) is one of the world's largest suppliers in the field of Applied LED Technology. It operates in two principal segments: Components where low brightness LEDs are used for status indication in electronic equipment; and Signals/Illumination which utilises the latest high brightness LED technology for Traffic and Rail Signals, Obstruction Lighting, Hazardous Location Lighting and for developing applications in more general illumination markets, including architectural and entertainment uses. Dialight plc has operations in The United Kingdom, Germany, the United States and Mexico. More information is available at: www.dialight.com. About Color Kinetics Color Kinetics Incorporated (NASDAQ: CLRK) transforms environments through new, dynamic uses of light. Its award-winning lighting systems and technologies apply the benefits of LEDs as a highly efficient, long lasting, environmentally friendly, and inherently digital source of illumination - reinventing light itself as a highly controllable medium. Color Kinetics also enables widespread adoption of LED lighting through OEM and licensing partnerships in diverse markets. The company is headquartered in Boston, MA with offices in the UK, China, and Japan. More information is available at: www.colorkinetics.com. This information is provided by RNS The company news service from the London Stock Exchange

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