Have to admit some of the ultra-cheap Edison base LED offerings are getting better. The first couple of rounds were scary-shoddy in both construction and safety. Still, I tend to stick with brands like Cree and Philips. Unlike some of the questionable stuff offered on ebay their performance tends to match advertised specs and there is an actual attempt at safety.
If you want to see the innards of a lot of off-brand electronics, check out the bigclivedotcom YouTube channel. Lots of cheap fleabay product tear downs, plus the guy has a pleasant presentation style, knows his stuff, and has a dry wit that's usually good for a chuckle.
Brad