In article , Eeyore wrote:

Kevin McMurtrie wrote:

http://www.lumileds.com/products/line.cfm?lineId=19

145 Typical lumens from 700mA @ 3.6V, or 58 lumens per watt. The LED is
a surface mount chip 3.1 x 4.6 x 2.1 millimeters in size. A thin strip
of 12 of these chips puts out light comparable to a 100W tungsten lamp
but only uses 30W.

The colour temperature won't be anywhere near comparable.

In any case don't 'white leds' use the same phosphor method of producing light
that CFLs do ?

No, they use a different phosphor made for LEDs. Color rendering of
white LEDs is more like that of "old tech" halophoaphate fluorescents than
like that of CFLs. At least the color rendering index is somewhat better
than that of "old tech cool white".

- Don Klipstein )