What if any drawbacks would not overdriving a bulb have in a mod? Say driving a Phillips 5761, Wa1111, etc with a 6 volt 4000mah 1/2 d cell stick. I'm planning some overdriven mods ofcourse (Mag60, ROP), but besides the standard output the bulb was made for what other negatives are there. I'm a newbie and trying to get it together. Thx.