LED Assembly Replaces Incandescent Lamps

May 16, 2006

EL SEGUNDO, Calif. (April 24, 2006) — DDP, a leader in engineered LED solutions, has developed LED lamp assemblies specifically designed for retrofitting and replacing traditional incandescent lamps. These LED assemblies can be designed to meet specific color and brightness levels per the specific requirements of an application.

DDP has already delivered such lamps to replace the 40watt Edison-based lamps embedded in train station platform floors. DDP’s engineered LED solution works with the existing flashing circuitry to signal impending train arrivals by increasing the light output and flashing the lamps.

In an effort to save maintenance costs, Washington Metro Area Transit Authority (WMATA) engineers looked to replace incandescent lamps used in the subway station platforms with solid-state lighting. Boarding station platforms require a specific color and brightness level and the LED lamps must hold up under the constant change in voltage used to vary the light intensities and the never-ending 2Hz flashing. The LED solution developed by DDP is capable of illuminating the station platforms through 9”-round, 3”-thick glass lenses embedded in the platform floors. The assemblies are also an easy field retrofit for WMATA’s maintenance staff.

“Given the unique parameters of the application we were able to develop an LED assembly that met all the requirements of the WMATA,” said Tony Toniolo, DDP President. “This application is a perfect example of our expertise in refreshing standard applications with reliable engineered LED solutions that decrease maintenance costs while meeting or even elevating the desired lighting effects.”

For WMATA, DDP’s engineered solution is a large circular array of warm-white 5mm LEDs designed in a dense pattern to replace the light output of the 40W bulb while creating a color close enough to incandescent to be aesthetically acceptable. In addition, a long extended sleeve with the Edison screw base allowed the maintenance staff to use the existing mechanical fixtures embedded in the platform floor and still get the lamp close enough to the lens to make the light output acceptable.

DDP incandescent light replacement solutions are available in either standard or custom assemblies. Samples are available from DDP with a typical lead-time of 1 week.

About DDP

Established in 1970, DDP provides unmatched service and attention to customers in the form of engineering, innovative designs, LED prototypes, test and evaluation, and tailored LED solutions for specific indication and illumination applications. Located in El Segundo, Calif., DDP’s 45,000-square-foot manufacturing facility includes a flexible production line, a dedicated quality assurance department, surface-mount assembly equipment, a machine shop for prototyping and development, and an engineering lab for new product design and qualification. DDP is ISO 9001 certified, demonstrating its commitment to continuous improvement of products, processes, and responsiveness to the needs of customers.