LED drivers to match lights?

Hi All
I have looked at a bunch of DIY LED bike/headlamp instr. and would like to give them a try, with my own spin. I just need a litle guidence an some bulbs to match drivers, I don't want to use the BuckPack systems. I will be powering these with a 14.8v or 18.5v li-ion battery system
Here is the bulb I think I would like to use.
http://www.ebay.com/itm/NEW-Cree-Single-Die-XM-L-LED-T6-w-20mm-Star-Base-/390319928941?pt=LH_DefaultDomain_0&hash=item5ae0e1766d

Now there are different idea's for drivers, with this on can I run 3 of the bulbs on one driver or should I build three drivers?
https://www.instructables.com/id/Super-simple-high-power-LED-driver/

Same for these two drivers.
https://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/

http://www.dealextreme.com/p/5v-12v-9w-3-cree-3-mode-circuit-board-for-flashlights-16-7mm-5-6mm-25516

This is the driver mode for the last one.
https://www.instructables.com/id/Improved-high-power-LED-bike-head-light-with-integ/

Thanks for all your help and the time you all put into this great site!!!