Excellent for the price, bright enough to be confidently driving in any weather with tinted windshield. The exact candela output (lumens are meaningless) will depend on design of your headlights. I took a few measurements for the lighting nerds out there though...
CCT: 7637K, quite a bit colder than advertised. CRI: 76.6, pretty respectable for cheap emitters. Naturally, the biggest dip is in R9, which reads at -1.8 (yes, that's a negative value). In other words, it absolutely sucks at reproducing deep reds. R12 is barely adequate and reads just below 40, so don't expect faithful blues either.
Oh, and then of course there's duv. In this case, duv = -0.0016, which is within both ANSI and EnergyStar recommended ranges.
To summarize, the light is adequately bright, flicker-free, cold and very neutral with a slight magenta tint and pretty bad (although expected in this price range) red reproduction. More than adequate for driving, but if you're looking for headlights to use in professional photo or video production - get a Beamtech (which costs 10x more, sadly).
