I've been running the LED bulbs in that location for over 4 years w/o issue. And w/o a rubber-band. My objective was simply to replace the yellow'ish-incandescent light w/ the more white'ish to match my H.I.D.'s; I never wanted the parking-lights component of the front-bumper combo' lights to be an independent source of light on par w/ driving-lights. For that purpose, the Happy-Meal money "cheap leds" work just fine, for me. That's where I disagree w/ the O.P.
And yes, I agree, the LED light-bar/band looks rather gnarly in the front bumper combo' lights. I was just pointing out a very cost-effective solution (multiple array of high-output LED's for literally peanuts), not that I/myself would install it. . .
I never insinuated nor alluded to such. Don't put words in my mouth please. I did quite the contrary, and gave credence & affirmation towards what the final anticipated costs presumably would be. I'm not questioning your costs, motives, or anything along those lines. . .
If you're donating your time already spent on R&D, fabricating/assembling, packaging/shipping... meaning the only cost is for the materials, then kudos to you & you really don't have to be so generous! Though, it'd be nice to know if the cost would be $50, $60, $100, or more per-pair/shipped. Since I'm still commenting on this thread obviously shows that I have a keen interest in the offering. . .
G/luck w/ the project, as aforementioned, it's def' cool. . .