I like traffic cones :S
so those big housing units that look like... heat sinks and act like heat sinks are there for looks only.Your statement is complete fallacy. I have LED pot lights in my house. They are 12 watt dimmable lights that replace a 60w halogen flood light or a 60w incandescent. After running on full power for an hour I can literally reach up and unscrew the bulb without even the faintest sensation of heat on my fingertips.
I guess the light bulb salesman was dead wrong when he explained at my old place of work (trying to get us to buy the more expensive LEDs vs CFLs and MRs) why they were so damn bulky and heavy compared to the 35W MR35 and CFLs they were replacing.