"Reviews say that in the long run, the extremely high cost ($50 to $100) of big screw-in LED light bulbs will pay for itself in savings on electricity. However, we were unable to find any compelling evidence that the rated life holds true for every bulb."
"Owners say they're dimmer than expected, even when used in a light fixture that takes advantage of their directional beam (usually a 60- to 100-degree angle). Quite a few owners find the light too cold and bluish. A few LED light bulbs are designed to cast light in all directions, to be used in a regular table lamp, but they don't put out enough lumens to make this realistic except for dim "atmospheric" background lighting."