What would be the result of over-volting this strobe (http://www.vellemanusa.com/us/enu/product/view/?id=350400) light at 14.4 volts?

I am running one now on a 12V SLA and it is awesome, but I want to switch to a 14.4 Volt system.

(Meant to type 14.4V in heading)

I've been running mine at 14.4V for a couple of years now with no problems. Maybe it flashes faster -- I don't know since I've never run it a a lower voltage.