Amazing! And they look just like incandescent bulbs because they also have ceramic. I highly doubted they were LED when I first opened the box, but they don't get hot (nor melt branches) and one bulb actually broke and you can see the LED inside. You can see that the bottom filament in the first picture has bulbs through everything but the bottom of the tree. Verdict - Opticore LED lights, blue and white are terrible. The second picture of the tree consists entirely of ceramic LED light bulbs! Nice! And it's time! I've waited years for a company to develop these because plastic LED bulbs just didn't fit!