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New Patented StackLED® LED Lamps Bridge the Man-Machine Interface

TORRANCE, CA — October 4, 1999 — LEDtronics® announces its most advanced direct incandescent replacement StackLED® (U.S. patent 404,506) LED lamps for process control and machine status indicator stack light towers. Bright, reliable and cost-effective, StackLED lamps emit intense visible light to bridge the man-machine interface.

StackLED lamps are plug-compatible with most major manufacturers’ stack light towers, require no modification to the indicator column, and can be used with flasher circuits. With a typical operating life measured in years not hours, StackLED lamps provide major cost savings along with non-interrupted information flow. Incorporating state-of-the-art LED (light emitting diode) technology and solid-state design, StackLED lamps withstand the mechanical (vibrations) and electrical stresses (fluctuations) that exist in the environments where vertical indicator towers are commonly used.

StackLED lamps are ideal for conveyor systems, pick-and-place assemblers, automated surface mount machines, process control lines and high noise industrial environments. StackLED lamp packages size range from .86-inches wide by 1.80-inches to 1.30-inches wide by 2.0-inches high. With a choice of sizes, standard electrical bases, six sunlight-visible colors, industry-standard voltages, there’s a StackLED lamp to meet your requirements.

Depending on the model, StackLED lamps are comprised of a cluster of LEDs (numbering from 4 to 24) to provide 360-degree viewing. Electrical bases available are 15mm DC bayonet, 9mm SC bayonet, 9mm miniature bayonet and candelabra. Polycarbonate bulbs resist impact, optimize viewing and maximize light dispersion. StackLED lamps come in all standard voltages (12v, 24v, 120v, 230v) AC or DC as well as AC/DC bipolar. StackLED lamps retrofit to a specific manufacturer’s stack holder model and are designed specifically to operate in those models. Choose from six sunlight-visible colored LEDs: Red (AlGaAs, 660nm), Amber (InGaAIP, 612nm), Yellow (InGaAlP, 595nm) Green (SiC/GaN, 525nm), Blue (GaN, 470nm), White (SiC/GaN).

StackLED lamps’ solid-state circuitry renders them impervious to electrical and mechanical shock, vibration, frequent switching and environmental extremes. With an average life span of 100,000-plus hours (11 years), StackLED lamps operate reliably year after year. That’s more than 20 times longer than the equivalent incandescent lamp! Savings from reduced maintenance costs and downtime quickly return the capital investment expenditure! Additionally, StackLEDs produce almost no heat and require 80% - 90% less operating power than equivalent incandescents, making them as friendly to the environment as they are to the operating budget.

Founded in 1983, LEDtronics® leads where others only follow when it comes to designing, manufacturing and packaging state-of-the-art LEDs to meet the world’s constantly changing lighting needs. Our inventive product line encompasses an array of direct incandescent lamp replacement Based LEDs, low-cost snap-in and relampable Panel Mount LEDs, high intensity sunlight-visible Discrete LEDs, PCB LEDs circuit board status indicators, surface mount diodes SMT LEDs, full-spectrum rainbow RGB LEDs and Infrared (IR) LEDs.

Prices for StackLED Lamps range from $16.00 - $69.00 each in 100-piece quantity depending on the base, cluster size and LED color. (Quantity discounts are available.) For a additional information on incorporating StackLED lamps into your industrial control equipment, contact LEDtronics toll free at 1-800-579-4875, telephone 310-534-1505, fax at 310-534-1424, click here to email us or mail at LEDtronics Inc., 23105 Kashiwa Court, Torrance, CA 90505. Visit our website at

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