The great LED lightbulb rip-off: One in four expensive ‘long-life’ bulbs doesn’t last anything like as long as the makers claim article tells that many energy-efficient LED light bulbs failed before their advertised lifespan, tests have found. Disappointing result comes despite claims of them lasting 25,000 hours. The consumer watchdog and European partners tested five samples of 46 types of bulb. LED light bulbs have a tendency to make grand claims about their lifespan, many are failing well before promised lifetime. New EU regulations say that from March 1, 90 per cent of any batch of LED (light emitting diode) bulbs should last at least 6,000 hours.
In The big lie about LED lighting article Scott Elder, principal engineer with Linear Technology discusses why LED lighting fails earlier than consumers might expect. Despite all this investment converting home lighting to LED bulbs, I have yet to experience the primary benefit of long life. Why? As it turns out, the answer is quite simple. The lifetime is not a function of the LED component itself, but rather the total circuit solution. Virtually everyone who scored the lamp as a one in Amazon.com rating claimed their score was because the lamps failed very quickly.
LED lamp life expectancy depends on fixture type and usage scenario article tells that typically lamp manufacturer have temperature data to share or specs on use in enclosures. We learned that no standards exist to test and provide this information, more so that the LED lamp is considered an isolated thermal plane and not considered to dissipate heat into the fixture. Electronics folks know there are no new technical breakthroughs in thermal management. The latest LED lamps run electronics hotter than their predecessors and drivers can fail quickly from de-soldering or thermal breakdown of components.