anything over 4300k
IMO .. if you want to get the best light.. stay in the 4100 - 4300 range..
you get the right projector you'll get the purple junk.. and nice cut off
with the ece projectors you'll get even more purple twinkle
typically hella ballast are the best..philps bulbs.. just get any OEM set of a ballast and bulbs and that should suffice..
the valeos i got from ebay.. theres a seller there who is trustworthy.. and pretty freqent on hidforum.com so i'll pm you his email if you want
i bought from him already off ebay.. and so has my friend.. he packs it good... but i'm going to first install these on my mom's to make sure it really does have that nice purple... but i think it would as the people on hidforum have said its nearly identical to a d2s size housing..
do your reasearch before jumping into all this though.. i searched hid forum and i couldn't find anyone else who has done a retrofit for the celica.. except this one company did but said they wouldn't do it again cause its too hard
well i'll take a stab at it if i'm successful with my moms during the winter.. maybe i'll get to the celi in the spring