You don't need to bump the post up every few hours, lad. And I think they're calling the next Luxeon the 'NextGen', or something similar, IIRC, not LuxIV.
The 'III' and 'V' relate to the theoretical wattage of the LEDs, anyways - they're not product or model numbers.
Actually, the official name is the luxeon "K2".
Haesslich, actually, lumileds documentation refers to the leds as "Luxeon, LuxeonIII, & LuxeonV". As the wattage varies quite a bit from different colors, etc.
THE_dAY, where on another forum? We'd like to see...
i too had googled "luxeon iv"
here is the site:
{http://forums.linear1.org/index.php/topic,155.0.html}
it's just a guy that said he got his hands on one.
i also remember NewBie talking about the luxeon IV.
I've heard that the K2 was initially announced to be available Q2 of this year, but I've also heard that Lumileds won't be sampling until late this year, with production sometime next year.