http://led.linear1.org/light-bulbs-waste-power/Well, that's not really going to be a shocker to anyome. The interesting part is that lack of UL listing/approval is impeding adoption of solid-state lighting in the home. That's very interesting.
Hmmmm...It might interest you to know that UL listing is NOT a US law. UL is ONLY a testing facility with a good racket and a bunch of sleazy marketing ploys.
There is no law that says anything needs to be UL approved, but they have the retailers convinced that they have to. Consequently you generally do not find anything in stores that is not and to not get UL is commercial suicide.
What the UL does is to charge $5000 to allow you to use their trademark, more if there is actual testing involved. A more stringent test can be had at numerous testing facilities for CE for less money.
The thing that keeps manufacturers at bay is not the law, but the marketing, and the fact that unless the crooked jerks at UL get what ever it is they want to charge you can't put their trademark on it.
Dan