[Freeport]

I agree with your math and I too would like to see them rated in lumen. According to the web site, they seem to be relating it to the output of a 100W incandesant bulb, though even that is suspect: "Our premium 10-watt EcoLED white light bulb that replaces a 100-watt regular bulb. Lasts 50,000 hours and saves you nearly $450 in electricity over its life*.".

[Donald Rumsfeld Fan]

I agree with your math and I too would like to see them rated in lumen. According to the web site, they seem to be relating it to the output of a 100W incandesant bulb, though even that is suspect:

"Our premium 10-watt EcoLED white light bulb that replaces a 100-watt regular bulb. Lasts 50,000 hours and saves you nearly $450 in electricity over its life*."

Assuming this is a apples to apples comparison they must mean that the light output (lumens) of the 10 watt LED is equal to the light output of a 100 watt incandescent. That would be about 1700 lumens.

The MTBF would also have to be taken into consideration when doing a cost comparison analysis.