Comparing 2 units Fitorch MR35, an older and a newer batch.
The old ones's UV LED (top) looks like this: (4 lines in a square box)
The newer MR35 UV LED looks like a 4x4 grid.
Both seem to be UV365 (just basing on what can show up in our local currency.
The older (4 lines) UV365 (assumed to be UV365) has more visible white light.
The newer (grid) UV365 seems to have slightly less visible white light (but still not 'clean' compared to Nichia UV365 LED).
But when I try to place ZWB2 UV filter (I only held the filter in front of the LED) and try it to show some features of our local currency, the older (4-lines) UV365 + ZWB2 filter seems to show the 'hidden features' (of our local currency) a slightly more clearly compared to the (grid) UV365 + ZWB2 filter though.
(Using UV395, won't show those features on our local currency, so this is why I guess they may be UV365 or somewhere close, maybe UV375 if there's such a thing?)
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Tried a quick image search of the above UV LEDs, the "older" "4-lines" LED seems to look a bit like the LedEngin LZ1-10UB00-00U5,
while the newer "grid" LED looks a bit like the LedEngin LZ1-x0UV0R.
I mentioned "looks a bit like" because it may be different LED or clones... (the LedEngin have a dark 'background' while the ones on the MR35 have a white 'background')