PowerSource

In spite of their high lighting efficiency, the cost of high-brightness (HB) LEDs for commodity applications is not low enough yet to compete head-on with older forms of lighting such as incandescent and high-intensity discharge (HID). However, certain applications can justify paying a premium for high-efficiency, long life, ruggedness, and light-color temperature control, and these applications are the sweet spot for HB LEDs.

Here’s a good example (pictured in the brochure below): Solar-powered outdoor lighting for off-grid applications. This Solar Vision Pole’s lamp post is especially novel, because rather than use a standard rigid solar panel that requires additional bracing for wind shear (and can attract the attention of scavenging thieves), the pole itself is wrapped with a flexible solar panel that charges 4 gel batteries located in the base of the pole. The size of the panel and the number of batteries limits the lighting to 50W which would be a pretty weak traditional light source, but makes for a strong cool-white LED light. 6 hours of charging is enough to run the light all night.

Each pole/light/battery combination sells for about $5,000, which seems steep, but imagine lighting, say, a parking lot where there’s no access to electrical power. This approach can be a practical, low-maintenance lighting solution.

For more ideas on what the future holds for LEDs, catch Cary Eskow’s keynote speech at EDN’s free “Designing with LEDs” Workshop in Chicago next week on October 6.

Click here for the larger version of the PDF brochure.