One of the most misunderstood specifications on a lighting product is the life rating. Whether it’s a traditional lamp or a new LED fixture the term “life” or “rated Life” doesn’t mean that every single product will go out at that specific hour. There’s no way for a manufacturer to predict the specific moment that product will fail, but using certain testing methods, predictors, and criteria we are able to give a prediction on lamp performance and the usable life of the product.
For the sake of this blog, we’ll focus on the life ratings of solid-state LED devices, not traditional lamps. Just know that traditional amps have a different testing and life criteria than LEDs.
LED life ratings refer to the expected useable lifespan of an LED lamp or fixture. This rating is typically expressed in hours and indicates how long the light is expected to last under normal operating conditions. Common ratings you might encounter include 15,000, 25,000, or even 50,000 hours.
The life rating of an LED is determined through rigorous testing and is usually based on the time it takes for the light output to decrease to 70% of its original brightness, a point known as L70. This means that after reaching the rated hours, the LED will still produce some light but will not be as bright as when it was new. At that time the manufacturer recommends replacement.
The testing of LED life ratings is generally conducted under controlled conditions, following standards set by organizations such as the Illuminating Engineering Society (IES) and the American National Standards Institute (ANSI). These tests consider various factors, including:
* Temperature: LEDs perform best at certain temperatures. High heat can significantly reduce their lifespan.
* Voltage: Operating an LED at the correct voltage is crucial. Over-voltage can lead to significantly early failure.
* Usage Patterns: Continuous use versus intermittent use can affect how long an LED lasts.
Understanding LED life ratings is essential for several reasons:
1. Cost-Effectiveness: While LED bulbs may have a higher upfront cost compared to traditional incandescent bulbs, their long lifespan means you’ll replace them less frequently, leading to savings over time.
2. Maintenance Planning: For commercial applications, knowing the life rating helps in planning maintenance schedules, minimizing disruptions, and ensuring consistent lighting quality.
3. Environmental Impact: Longer-lasting LEDs reduce waste and the frequency of replacements, contributing to a more sustainable environment.
4. Performance Expectations: Knowing the life rating helps set realistic expectations for performance and brightness over time.
When selecting LED lighting, consider the following tips:
*Check to make sure the life rating on the LED products you’re buying are based on L70 Ratings: Look for products that provide the L70 rating, as this gives you a clearer indication of when the product will begin to dim significantly and should be replaced.
*Consider Your Environment: If you’re using LEDs in high-temperature areas (like commercial kitchens or outdoor spaces in hot climates), choose bulbs designed to withstand these conditions.
*Look for Quality Certifications: Opt for products from reputable manufacturers that adhere to industry standards, which can often be found on packaging or product specifications.
Understanding LED lighting life ratings is crucial for making informed decisions about your lighting choices. By considering these ratings, you can ensure that you select the best products for your needs, save money in the long run, and contribute to a more sustainable future. Whether you’re lighting your home or a commercial space, knowing how long your LEDs will last can help you make the best choices for your lighting needs.
