X0203 3 2009-12-16 0 0000917523 Nexxus Lighting, Inc. NEXS 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M C/O SPECIAL SITUATIONS FUNDS 527 MADISON AVENUE, SUITE 2600 NEW YORK NY 10022 0 0 1 0 Common Stock 2000000 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) & David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Cayman Fund, L.P. (Cay), Special Situations Private Equity Fund, L.P. (PE), Special Situations Technology Fund, LP (Tech) & Special Situations Technology II, Fund, L.P. (Tech II), respectively. 333,333 shares of CS are held by Cay, 333,333 shares of CS are held by PE, 186,667 shares of CS are held by Tech & 1,146,667 shares of CS are held by Tech II. The interest of Marxe and Greenhouse in the shares of Common Stock owned by Cay, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. Austin W. Marxe 2009-12-22 David M. Greenhouse 2009-12-22