I am in search of headlights for my 98-00 ls400 but i keep coming across “celsior” headlights will they fit like oem on my ls400

 

Celsior's head lights are designed for the RHD and the cut line is like this below in this link. The left side goes up and it's not good to use at LHD countries. The driver on the other side will be blinded if used in LHD countries.

 

This is another photo.

 

correct, celsior are mainly seen in RHD countries, with the "flare" to the left to light up sidewalks and curb signs.

however LS400 have RHD and LHD models around the world. case in point, in australia which is RHD, they have the LS400 out there!

but, i have japanese RHD headlights on my honda stateside and it's not too bad - then again i'm not driving toward my own car to notice any glare.

 

Before getting replacement headlight assemblies, you need to know if your LS has Halogen or HID low beams. The two housings are not interchangeable. If you have HID lighting, you'll see a yellow warning label on the housing and "D2R" on the lens.




Like others have said, the beam aim will be different for LHD and RHD. I would keep the LHD beam pattern if possible.