In another thread someone asks the metaphorical question is [insert light here] under driven?
This is not an exact term like driver or LED or anodizing, so what do you consider an under driven (or over driven) LED
Less than 2x the rated current. J)
xml less than 2a on high is under driven no matter how you look at it, whether its a first gen or second gen...
as a flashaholic, if its a first gen and not driven at least 3a its under driven. if its a second gen and not at least 5a its under driven... at those specs, im not a true flashaholic... so i am happy to post these specs 
The point at which Match can no longer get any more lumens out of an emitter by a algorithm of maximum vf with the application of increasing current. See Match Graphs. J) J) J)
this is my favourite definition so far 