as far as I can tell, the US version comes ONLY in 220. You should not attempt to change input voltage as they are already significantly stepped-down from the 400v input voltage standard to the ballast (I think... whazzup?)
LEDnewbie... there are nice dimples on the lamp that make centering a breeze... I believe there is about a 4" offset from the ballast side hanger to the lamp side hanger to center the lamp perfectly, but don't take my word as gospel. I set these up a while back and puff too much to remember such detail vividly.
Thank u for actually understanding what I'm asking!!!!!!