For starters they are fog lights and can only be legally used in the fog, they also have to be adjusted to a 3.5% down angle
driving lights have to be mounted within 50mm of the headlight centre line to be able to be used on the road UNLESS factory fitted
Those grills will limit the light output no matter what
I would look for a set of STi HID headlights and fit them to improve your lights
or fit a set or "rally" style driving lights but this means you will have GREAT lights on full but next to nothing on dip.
Here are the upgrades I have found to work with existing setups,
1/ Most modern cars have a plastic headlight so increasing the wattage does damage ( extra heat causes it to melt) so fit ULTRA or what have you same wattage bulbs will give you a whiter light but not a lot more ( i have done this with my hilux and have gained no LIGHT out put but have a Better light)
2/ rewire your existing headlights using larger wires and separate relays ( or you can buy setups that do this) This has been the greatest upgrade to my headlights on every vehicle i have owned ( going from a '56 morris, thru various subarus to my current 05 hilux)
3/fit after market driving lights for the extra long distance on the open highway but you can only fit one set without doing some tricky wiring as you are only aloud 4 headlights and 2 foglights at anyone time.
86 Leone with spotlights
My landcruiser which has the best headlights you can get, I upgraded the wiring, fitted aftermarket 7" headlights (steel backed) so I could run 130/90 in them, then I fitted a set of spot lights and were running 130 bulbs in them and also a set of foglights running 130 bulbs in them, so awesome
'90 Legacy with uprated wiring and driving lights ( still really poo's on dip)