Originally posted by JensE As long as you don't want to freeze motion via a very shorts light pulse, constant light is indeed often preferable. The peak intensity of LED lights is lower, so even when "flashing" briefly, they still need longer illumination than a flash. I'd also recommend to research/test the color rendering if you can. Highly efficient LEDs often have a light spectrum with a lot of gaps, leading to generally poor color reproduction.
I have been curious about the color rendering of "high CRI" LEDs but I am guessing they will not be as balanced as a true strobe based light. LEDs that are considered "warm white" may be a little better balanced, but I believe they all tend to have a blue "spike" and gaps in the greenish and red colors. I would like to do some experiments with various LED emitter devices, but just haven't had the time.
Also LEDs can be "pulsed" for very short periods to push the light output pretty high, but my guess is these inexpensive units don't have that feature. And even there you would still be dependent on the camera shutter for speed versus the short burst of a strobe (and not to mention tricky to sync with the shutter).
Anyway probably more info than the OP wanted, I digress into the weeds...