Quoted from SantaEatsCheese:In my experience, the failure rate on COMETs has been less than 1% out of the package.
I've purchased hundreds of the OptiFlux bulbs (Nothing else like them on the market!), but I'm no longer using them due to an incredibly high failure rate in the past couple years. At one point, I thought a coil was burning up in my Fish Tales and it turns out it was just an LED frying. They brown up!
I'll still be ordering the Twin 2835s by the hundreds, however. Great universal bulb.