I've had a total of 4 Savi Melody LED lights fail in about 1.5 years. I've just replaced 3 today and noted why they failed.
These LED lights are made of 2 separate housings. In the photo below, the left housing is the LED and a large aluminum heat sink. The back or right housing is the electronics.
All three of my recent failures were from flooding of the LED housing due to cracks in the rear of the housing near the endcap / connector end. You can see this in the following photos. All 3 were like this.
I immediately suspected high heat as the cause of the cracked housing and not installation as these lights did not show signs of failure for several months. Also, it just looked like high heat problems I've seen in the past in other devices. However, I did not realize LEDs could get so hot. But then, once I took apart the LED housing, I realized it is mostly a large solid aliminum round - which acts as a heat sink. Unfortunately, I think they underestimated the amount of heat generated.
Nexxus did send me new lights without question which I installed today. The new ones are of a different design made of one single larger housing. This puts the high heat more in the middle than at the end. Hopefully this will help solve the problem.
I'd like to hear from anyone else who has these lights and to see if you've had problems.