I'm not really wedded to a conclusion or "mind set" here. I just don't buy your assertions, which you seem to have pulled out of your ars :) My proposition is

I'm not really wedded to a conclusion or "mind set" here. I just don't buy your assertions, which you seem to have pulled out of your ars :) My proposition is pretty simple: I would like to see LED light bulbs adopt some of the same modularity used in other LED lighting products such as flash lights and bike headlights. I don't have to throw away an entire headlight in order to upgrade, and I don't want to throw away heavy aluminum light bulbs either. I have no idea if there's a market in this, but Nate's money is on the table. Now, if you you really knew this subject well, you might have pointed out that cooling requirements are pretty specific to the type of LED and driver, and are likely to change rapidly, thus making current shrouds and heat sinks subject to imminent obsolescence. Or you might have pointed out the possibility that remote phosphors will catch on widely, which would seriously complicate the whole arrangement. Or you might have pointed out the fact that the economics of manufacturing mass-market lighting appears to favor arrays of cheap LEDs over single expensive LEDs, which would obviously make modularity difficult or impossible. If indeed modularity would double the cost of a bulb, as you say, then that would obviously kill the idea as well. If you would be so kind, please provide a citation for this.