With XML and 3 modes http://www.dealextreme.com/p/t6-waterproof-xml-t6-3-mode-1200-lumen-white-led-bike-light-with-battery-pack-set-82510?r=43033281
With P7 and 3 modes http://www.dealextreme.com/p/p7-waterproof-ssc-p7-3-mode-900-lumen-white-led-bike-light-with-battery-pack-set-82509?r=43033281
XML 3 modes too http://www.dealextreme.com/p/t6-assault-crown-waterproof-xml-t6-3-mode-1200-lumen-white-led-bike-light-with-battery-pack-set-82508?r=43033281
Another XML 3 modes too http://www.dealextreme.com/p/t6-smooth-crown-waterproof-xml-t6-3-mode-1200-lumen-white-led-bike-light-with-battery-pack-set-82507?r=43033281
They are cheap compared with all the old ones (about 60-80 USD)
I don't think they're dumping old stock, just that DX is cheaper than MF. The batteries are ~$20, which leaves $25 for light. Perfectly achievable if all the other xml lights are anything to go by. A very good deal nonetheless.
I wonder what the difference is between the xml models. They're being offered by the same supplier at the same time (YangLighting), so perhaps they're all the same sans cosmetic differences. These are also regulated so great deal if the batteries hold up.
I'm a bit worried about the Lithium pack. Specs say 8.4V 4400mAh (4x18650). Don't the concerns over multi-18650 matter here? There's no way to balance them. Are they IMR (or LMR, whatever)? 1100mAh per cell seems really low, unless they're that crappy.
Ah, thanks for the correction. Yeah, I still don't trust the battery pack. Neither do I have a skills to make my own. Oh well, I'll stick with the single cell flashlight on my helmet then. Don't need the runtime anyway.
The strobe mode can be used on the rear of the bike to warn drivers if you are on the road. That's what all the bikers around here do at least. And it really helps get the drivers attention.