To be help of I am glad.
Well, if you don't have HIDs then don't worry about it. A standard H1 bulb isn't sensitive to the pulsations, not like the fancy electronics inside a ballasts. Also, an H1 bulb is a few dollars in cost compared to several hundred dollars in the case of a ballast.
So, the advice only applies to those who've got HIDs.
my hid is here, but when i do the installation, do i actually need to take off the bumpers etc or i can do it straight after the hood is open? seems like the space is pretty tight at the back of the headlighs