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Press Release
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COLOR KINETICS AWARDED TWO NEW PATENTS

Latest US patents relate to many present and future uses of intelligent solid-state lighting


Boston, MA - May 10, 2005 - Color Kinetics Incorporated (NASDAQ: CLRK), a pioneer of intelligent solid-state lighting systems and technologies, today announced the issuance of two new U.S. patents relating in part to LED-based illumination systems designed to generate color changing effects in enclosures, and to the use of LED-based light sources to convey information about temperature changes of a device.

Patent number 6,888,322, issued on May 3, is directed to a color changing enclosure where illumination is provided by multicolor LED-based sources. The color changing device could form part of a neon replacement system, tile light, consumer product, computer, peripheral or accessory, for example.

Patent number 6,883,929, issued on April 26, is directed to generating power for LED-based light sources based on a thermoelectric process called the Seebeck Effect, which allows a temperature differential to generate electricity. For example, the invention may be used in a stove where the temperature of the stove top is conveyed through the color of light emitted by a multicolor LED-based source.

"Color Kinetics continually looks to innovate new technologies and methods that will allow completely new uses of intelligent solid-state lighting, for example, to create dynamic or customizable color changing enclosures," said George Mueller, Chairman and CEO, Color Kinetics. "Beyond the replacement of conventional light sources in traditional applications, we are shaping completely new, intelligent uses of light with exciting market potential."

Color Kinetics now holds 40 issued patents and has more than 130 patent applications pending that range from core technology and products to high-level control systems, complete lighting systems, applications, environments and methods of use.



About Color Kinetics (www.colorkinetics.com)
Color Kinetics Incorporated (NASDAQ: CLRK) is a pioneer in the design, marketing and licensing of intelligent solid-state lighting systems and technologies. The company's award-winning product lines apply the practical and aesthetic benefits of LEDs to transcend the limits of traditional light sources for use in high-performance lighting and OEM and licensing applications. Its products and technologies leverage a patented layer of digital intelligence, called ChromacoreŽ, to generate and control millions of colors and dynamic lighting effects. Color Kinetics holds 40 patents and has over 130 patent applications pending that apply to many aspects of solid-state lighting technology. Founded in 1997, the company is headquartered in Boston, MA with offices in the UK, China, and a joint venture in Japan.



"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding Color Kinetics Incorporated's business that are not historical facts are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Readers are cautioned that these statements involve risks and uncertainties, are only predictions and may differ materially from actual future events and results. For a discussion of such risks and uncertainties, see "Risk Factors" in the Company's Annual Report on Form 10-K for the Twelve Months Ended December 31, 2004, File Number 000-50798, and most recent 10-Q, each as filed with the Securities and Exchange Commission.
Contact Info
Felicia Spagnoli:
fspagnoli@colorkinetics.com
Media Relations
Color Kinetics Incorporated
781-418-9292
Justine Alonzo:
jalonzo@colorkinetics.com
Investor Relations
Color Kinetics Incorporated
781-418-9272