The brightness from these style LEDs will almost always be easily bright enough for oncoming cagers to pick them up or cagers waiting to pull out. The fog style LED (such as the ones you are looking at) are great for exactly what you want them for. Bright enough to pick up critters along the sides of the road and easily bright enough to enhance low light riding. Good choice!
I have a similar style set on my bike from ADVMonster (44 series) with 4 CREE LEDs in each pod and a good wide beam pattern. I have a rotary dimmer switch on them that I set at a low setting. There is also a high beam override in the switch that allows these LEDs to go to full power each time you switch your headlight to high beam. On high, these LEDs are truly impressive!
I often hear about folks buying the brightest pencil beam LEDs they can find and telling me they just aim them down a bit o keep from blinding oncoming traffic. I smile, nod and wonder why they bought what they bought just to do that with them..........
If you take a minute and cruise around in the ADVMonster site (regardless of who's you buy) you will see he has a lot of photos of beam patterns. The fogs just make good sense.
http://stores.advmonster.com/rotary-led-dimmer-with-high-beam-bypass/http://stores.advmonster.com/model-44-led-off-road-flood-light/
