I use small/medium rectangular 55W halogen driving lamps in a fog lamp location, and they actually glare less than many other fog lamps, since the lens and housing/reflector shape gives a beam spread horizontally.
LEDs are different though, since the light output is direct from the source. You probably can do what you're thinking of, mount them in fog light locations and aim them a few degrees down, but I would guess that the "spot" nature of the beam (really just all the LEDs aimed parallel) isn't going to give you much benefit, at least not when compared to say, similar size 55W halogen driving lights of about the same size, mounted the same way.
I've noticed that these so-called "light bars" tend to have weak output unless a lot of LEDs are used, making them draw more than or close to the same amount of power as halogen driving/off-road lamps. Plenty of the "mini" LED light bars have pretty pathetic output, and aren't really useful as lights to see the road or terrain in front of the vehicle at even slow driving speeds.
I'm wary of knockoff lamps like these that use a similar-sounding brand name (in this case, Oslamp) to trick people into thinking they are somehow an official product of an established company (Osram). They may use 'Osram' LEDs, but for all we know, they use junk LEDs that Osram discarded for use in non-critical, non-vehicle applications.
Even if the output IS spectacular, the LEDs might be being overdriven to achieve that, so you will wind up with expensive paperweights when these finally give out in a few months when the company has changed their name and moved somewhere else.
The Amazon reviews are good, so these might be worth getting to try out, if you can use them as regular driving/off-road lamps if they don't work out in a lower fog light location, but just keep your expectations in check for the price these are at. They might actually be decent quality and last a good while, but generally it seems that the quality lamps with brand-name LEDs and warranties cost quite a bit, so i'd be skeptical of these in the long-term if not the short term.
I'd say some decent 55W rectangular driving lamps mounted as fog lights would do the trick and for a lot less money, but if you want to spend what the LEDs cost and try them out, go for it.
If you want more light output, as in, light on the road on low beam, then I'd suggest getting some quality halogen bulbs like Sylvania XtraVisions or Philips Hi-Visibility or Vision Plus, or even GE Nighthawks. That and a wiring harness for the headlight bulbs that increases the size of the wiring to the headlights and uses relays, can make a big difference in the amount of light on the road in front of the vehicle.
If you really want to spend some money, you can get HID projectors and retrofit a quality kit with bulbs and ballasts, but that can take quite a bit of time and work to do yourself, though the results can be worth it if you really want a lot of light with good efficiency.
