My experience with cheap Chinese LED floodlights:
I have purchased 15 10w, 6 20w, 6 50w, and the fish store I work for ordered an additional 20 20w fixtures. These were from three different manufacturers: VVME and two ebay distributors - internals and casings were almost identical on all but drivers varied with one, screws and wire caps varied on all. So far (all purchased less than 8 months ago) between the store and me all but 14 of the units have stopped working. So of the 47 purchased less than 30% are still working after less than a year.
They are very cheap and provide very nice light while they operate but don't expect to get much life out of the units. In every instance it was a failure of the driver which can be purchased for very cheap but it gets to be a bit of a headache repairing them all the time.
I will admit that my lights were being run in a hot environment often in the high 80s to high 90s. Perhaps the drivers wouldn't have burnt out somewhere cooler.
Only one of these is of the original I installed. Two of the replacements lights have failed in the last week:
A few of the lights I've repaired; I started mounting the drivers to larger heat syncs to get a bit more life out of them:
Always have to have backup drivers on hand:
Just part of the graveyard:
I was a big fan the first couple months but at this point I'm wishing I just purchased a legitimate aquarium light.