I too bought a bunch from Lighthound - I found the white ones were better than I expected (for $1) but the coloured lights were Kinda cheesy. The green was amazingly bright (and died after two days), the red less so (again, as expected), the amber was pitiful and the purple to be so near UV that I had to hide it from the kids.
OK, so I'm judging the each colour on a sample of one. But they probably won't appeal all that much to a non-flashaholic, anyway.
I cannot compare with other makes - the free lights I've received with flashlight orders have been the same make as these Lighthound samples - but they are good enough for what you use them for. I have the white lights on my keychain and clipped to all my bags and use them more than what I consider to by my EDC.