On Thu, 26 Nov 2009 14:58:02 -0000, "John"
wrote:

It is a pity we are 'stuck' with relating brightness to wattage. If we used
a proper definitive measure of brightness then manufacturers would have to
be more honest.
Brightness is something that can be properly measured with a calibrated
instrument. Relating everything to a poor performing incandescent is not
good science.

(Lux - Candela - Lumens - whatever)

Foot candles.

--
Frank Erskine