Tri Cree XP-E2 powering questions

[Alchaggy]

Hi everyone I am currently building my first lightsaber, but I have encountered and issue, I want to use a Tri-Cree XP-E2 all blue to light up my blade, and I am ordering a kit from this page: http://www.ledsupply.com/led-kits/dynamic-led-light-kit, the thing is I don?t know how they wire the LEDs inside the kit, if they are in parallel or in series, or if they are the brighter; the real issue (to me) is to order the righ bukpcuk, to use the right battery power and to choose the brightest ones. (between the XPG2, XPE2, XPTE, Luxeon Rebel) and if I the spot optics are good for the blade (32" by de way).

I want to have good battery life, so I have 4 18650 batteries for the purpose, but considering my issue with the LED module, I don't know how to assemble them to get the most brightness out of them and have a good battery life with more than one cell.

option 1: if the LEDs are in parallel should I use a 2 battery cells in parallel and a 1000mAh buckpuck or a 2100mAh buckpuck
option 2: if the LEDs are in series should I use 3 battery cells to reach the 12v (minus the 2volts taken by the buckpuck) so all the LEDs are getting the right voltage and with the same 1000mAh buckpuck

the two buckpucks I saw:
1. The 2100mAh capable: http://www.ledsupply.com/led-drivers...-dc-led-driver
2. The 1000mAh capable: http://www.ledsupply.com/led-drivers...dc-led-drivers

By the way, I saw on this post http://www.saberforum.com/index.php?topic=26812.0 that the guy uses a 5v source out of a battery bank, could I use the same source but with two or more 18650 battery cells in parallel to improve the mAh capacity?

I will apreciate any kind of help anyone could provide me to get the brightest and safest configuration whether the LEDs are in parallel or in series.

Thanks in advance