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I googled LED light efficiency what percentage of electricity becomes heat and looks like only about 20% of the input is wasted as heat? So a 15W LED light wou

I googled LED light efficiency what percentage of electricity becomes heat and looks like only about 20% of the input is wasted as heat? So a 15W LED light would only need 3W of cooling? It feels even more ridiculous when we put the numbers like this... There is no excuse for LED lights to not have adequate cooling or for them to fail because of overheating... > This means that about 80 percent of the electrical energy is converted to light, while 20 percent is lost and converted into other forms of energy such as heat.

sharpshadow 2y ago
Light bulbs are build to break and be replaced, as far as I understand we could have eternal light bulbs but that’s not in the interest of light bulb makers. That same logic might still apply for modern light solutions like LEDs. I have a more expensive LED bar which is build on top of aluminium to disperse the heat. Did you have heard about the Dubai Lamp? It’s basically a very efficient longlife LED which they only sell in UAE.
- daveguy 2y ago
  The Dubai Lamp is produced by Phillips, and is about 3x more efficient than typical LED bulbs -- normally 9w for 60w equivalent vs 3w. Their rated life is 25,000 hours, which is 2.5x longer than a typical 10,000 hour led. They are damn impressive, but not "forever". https://www.mea.lighting.philips.com/consumer/dubai-lamp https://www.mea.lighting.philips.com/consumer/dubai-lamp