I might be not the best person to answer, I just thought it might help you:

http://www.maplin.co.uk/Module.aspx?ModuleNo=3D98199

This 1.3W LED bulb claims to be equivalent of 20W halogen one.
However, this is only a spot light. To replacing a normal bulb you
might need much more LEDs to provide the same luminous power to each
direction. Also I have some doubts about the frequency, I guess the
spectrum is far more narrow than you would enjoy for long run, but I
might be wrong on that.

Tamas



On Fri, Feb 5, 2010 at 3:40 AM, Funny NYPD <funnynypd@yahoo.com> wrote:
> Try to replace the 60W and 100W regular light bulb with "LED light bulb",=
 I am curious how many lumen of the "LED light bulb" shall I use?
>
> =A0Funny N.
> Au Group Electronics, http://www.AuElectronics.com
> http://www.AuElectronics.com/products
> http://augroups.blogspot.com/
>
>
>
>
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