Thanks, i have read that due to "Auger recombination", then when below a certain level of LED current, the light photons just cant all properly escape from the LED silicon, and so at low currents, there is proportionally very much less light output....so in other words, if you view page 27 of the datasheet in the top post (top graph)......the unshown bit below 100mA is a region of very very low light flux output....thats why they dont show it.
Would you agree......if the bit below 100mA was just a plain extrapolation...then they would have shown it...but because it is in fact a region of (proportionally) very poor light output...they dont show it...for marketing reasons. Would you agree?