I laugh every time I see a lowered truck with a Grill Guard!!!  It's
throwing crap on just because you can.   It's not a 4x4, and your not going
off roading in that thing.   You should have enough light with the truck, if
not your going blind and maybe shouldn't be driving in the dark.   I'm also
not sure what the law is on accessory lighting.    It's one thing adding FOG
lights as they're below the bumper normally, but adding more light blinding
other drivers is another.   Off-Road use is another story, but again your
not driving a 4x4, and a lowered trucking is not going to be doing much of
that.

I would try instead to use one of the brighter whiter light bulbs.   For
example:

PIAA Headlight & Fog Light Bulbs
Superior Lighting - As Easy As Changing A Bulb!

 a.. 1 Year Warranty
 b.. Uses less amps than standard upgrade bulbs
 c.. DOT Approved & Legal in all states.
Upgrade your headlight bulbs. PIAA Platinum bulbs combine Super White
Technology with a high power XTRA Halogen Bulb for increased performance.
This allows the bulb to emit a beam of light that is whiter and brighter
than standard bulbs of the same style while using less amperage. PIAA Super
White bulbs approach the brightness and intensity of High Intensity
Discharge (HID) lamps at a fraction of the cost. These bulbs are tested and
certified to comply with SAE certification for white color. D.O.T. Approved.
50 state legal. The crystal blue light is similar to what is seen on today's
expensive luxury cars.

Check out someplace like www.stylinconcepts.com and check out the different
lights.   Do you really want to trash up your truck?

Also you lowered your truck, are your Headlights adjusted correctly?
Lowering your truck changes how the headlights are position, and you may not
be getting all of your trucks light output where you need it.