How to Design with LEDs

How to Design with LEDs: Iterative Approach Yields Fully Optimized Lighting Systems

While the cost of light emitting diodes (LEDs) is decreasing, they are still relatively expensive and their adoption should be carefully considered before making the switch. Optimization of the optic and other system components can reduce the number of LEDs needed and reduce the overall cost of the LED lighting fixture. Solid state lighting (SSL)…

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Mechanical Properties of Glass

Mechanical Properties of Glass: Design to Survive Stress, Impact, and Abrasion

When designing a lens for a harsh environment, you need to choose a material that is resistant to pressure, abrasion, and impact. Some applications, such as exterior aircraft lighting, can push a material to its limits. Exterior aircraft lenses are exposed to smog, dust, and other air pollutants at very high speeds; the resulting impacts…

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LED Useful Life

Challenges of Determining LED Useful Life

The transition to light emitting diodes (LEDs) from conventional light sources brings several new challenges to lighting engineers and designers. LEDs are much different than incandescent bulbs, especially in terms of useful life. It’s easy to determine the useful life of an incandescent lamp; if the light goes out, its useful life is over. This…

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Optical Properties of Glass

Optical Properties of Glass: How Light and Glass Interact

This is the second article in a three-part series that reviews the thermal, optical, and mechanical properties of glass. We will define common glass properties and explain their application and importance in component design. We often hear from engineers who are evaluating the impact of a design change from one lens material to another. For…

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Glass thermal resistance stage lighting

Glass Thermal Properties and Their Role in Product Design

This is the first article in a three-part series that reviews the thermal, optical, and mechanical properties of glass. We will define common glass properties and explain their application and importance in component design. It is critical to have a thorough understanding of glass thermal properties when designing with a glass lens or filter. When exposed…

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