H7,h4,h3,501

[N111MS_D]

hi
im buying xenon bulbs for my corsa 2005
iv already got the main xenon part
to get the full beam its = H7 fog lights are = H3 and side lights are = 501's

is the above right for my car..?

what are h4's then..?

[Obs]

full beam is h7 sidelights are 501 not sure on fogs but think they're h3

i believe H4 are the bulbs that are used on some cars for dipped and fullbeam as they have 2 brightnesses or something