Ringdale Signs Exclusive LED Lighting Agreement in Japan

Agreement Accelerates Ringdale's LED Lighting Business in Japan

AUSTIN, Texas and TOKYO, May 25, 2010 - Ringdale(R), Inc., a global leader in the development of energy
efficient, intelligent commercial LED lighting fixtures, today announced the
signing of an exclusive licensing, manufacturing and distribution agreement
for the region of Japan with Sojitz Systems Corp. The Sojitz Corporation is a
highly respected holding company with over $50 billion in revenues and a very
strong market position in Japan.

Sojitz manufactured lighting fixtures for streets, parking structures,
billboards, building exteriors, warehouses, offices, retail spaces, parks and
restaurants will be based on Ringdale's ActiveLED(TM) technology. The solid
state fixtures deliver better illumination and use 50-95% less energy than
conventional lighting sources such as incandescent, CFL, FL, HID, HPS and LED
bulb replacements.

"In our search for financially strong and technologically capable
partners in the major regions of the world we found Sojitz to be a very good
match in terms of access to the Japanese market and their ability to
manufacture in the region," said Klaus Bollmann, CEO and Chief Scientist,
Ringdale. "The agreement benefits both companies and provides us with
immediate access to Japan's multi-billion dollar, fast-growing market for
energy-efficient LED lighting."

"After detailed market research in the US and Japan, we selected
Ringdale's ActiveLED product line," said Kazunori Obata, President, Sojitz
Systems Corporation. "ActiveLED luminaires use less energy, operate cooler,
last longer and depreciate significantly less over time. This gives our
ActiveLED-based product line a distinct market advantage."

"The partnership is a perfect fit," according to Stephen Maysonave,
technology consultant at Ringdale. "Ringdale has designed a premiere line of
commercial LED lighting fixtures and Sojitz has a focus on quality and
complete access to the Japanese market."

Ringdale developed the ActiveLED lighting fixtures to meet the stringent
requirements of enterprise customers who are focused on replacing older,
inefficient lighting sources or outfitting new construction projects with
energy efficient, longer-lasting, low- or no-maintenance LED-based fixtures.

About Ringdale

Ringdale focuses on helping organizations incorporate "green savings"
into their business environments. Ringdale provides ActiveLED(TM) luminaires
with patented, solid-state lighting control and thermal management technology
as well as a wide range of secure document output management, access control
and document workflow solutions. Ringdale Inc. is based in the United States
with offices in UK, France, Germany, Japan and Singapore and is part of the
Network Technology PLC Group of Companies (NTY) listed on the London Stock
Exchange. Visit Ringdale at www.ringdale.com/lighting .

About Sojitz

Sojitz Systems Corp. is a subsidiary company of Sojitz Corporation. The
Sojitz Corporation is a Japan-based holding company comprised of 522
companies, including 147 subsidiaries and affiliates in Japan and 375
overseas. Sojitz has initiated its environmental and new energy efforts under
a management plan called "Shine 2011." Visit Sojitz at
www.sojitz-sys.com/eng .

Ringdale(R) and ActiveLED(TM) are trademarks or registered trademarks of
Ringdale Inc.

    For further information please contact:

    Susan Vaughan
    Ringdale, Inc.
    Tel: +1-512-288-9080

For further information please contact: Susan Vaughan, Ringdale, Inc., Tel: +1-512-288-9080