I've got most of my leds from discounters. Cheap brands...
And... they're all perfect...
With the exceptions of some, all the rest are not coming from an lfs.
My experience is that they don't really have to be specific aquarium lights to do the job. Which can be very fortunate for the wallet.
Even some lfs owners came to my place and they thought it was a expensive investment what I've got. I told them how cheap they were. And they were amazed. But they all told me that they weren't planning to tell this to their own customers. For that would mean less sales... But yes, they got convinced that even non or cheaper brands were doing the job perfectly as well...