Hi ko
Just to let you know that Xenon HID lights are illegal on vehicles that aren't factory released with them, Xenon's require the auto levelling feature that your vehicle wouldn't have.
If you choose to still do it
you will require the 35w ( 3200Lm - 1600Lm per bulb ) versions for high and low beams, the low beams sit behind a projector lens which will direct their brightness.
55w versions ( 4500Lm ) would be way to bright to oncoming traffic and you wont be able to reduce the brightness.
DRL fogs are slightly cheaper here
Parts Bumper DRL FOG Light Lamp Cover FIT Hyundai 2012 2016 Elantra GT I30 | eBayMake sure to double check your high and low bulb requirements as mine ( 2013 i30 Euro built ) takes H7 bulbs for both high and low.
After re-looking at what bulbs you had linked I realised you are only looking at Halogen/Xenon bulbs
which aren't true Xenon/HID, I've no experience in these bulbs so cant offer much help with those sorry.