Well, I've tested too many LEDs. The emergency flasher is the best way to perform side by side comparisons. Unfortunately, repeatedly pushing the emergency flasher plunger eventually broke the internal clip that retains the emergency flasher in depressed mode. Well, that stinks.
Of course, one solution is to call the vendors, break out the wallet and order a replacement. Another, is the stabbing toothpick technique. I actually tried that; but, lost all confidence when I found my lights flashing two days later.
Then an idea hit me. Not sure that I can effectively describe it. Essentially, I drilled and tapped a very small hole above the emergency flasher button and into the flasher's black surround. I used a 2/56" tap. With a 1/4" long 2/56" machine screw I mounted a metal latch (actually a portion of a small picture hanger) that can lock down the button; or, easily swivel to the side to allow release. Works great and doesn't look to cheesy IMHO.