I do think 200 is a lot to ask for and it might help people decide if someone can get hold of the UV LED sample, or even some photos from the manufacturer.
I will ask Saphire if she (he? you never know..) could ask Romisen which led they are going to use, with picture.
In the meantime, I just found by accident a reserved dedicated page for this light on the Tinywind site, with 'sold out', they do the same trick as banggood with the X6 group buy. Mind that the pictures are old pictures from the 400nm version, so it gives no clue about the led.
365nm is not better, it is different. It shows the fluorescent markers in banknotes much better without the purple glow. But 400nm leds are more efficient and will show glowinthedark stuff brighter. 400nm is said to be better for organics stains as well (blood, urine). 365nm is more dangerous because your eyes can not see it at all, while your eyes have a low sensitivity for 400nm.
I'd be very disappointed if it wasn't 365nm, and surprised too because I have the impression that it is understood well that that is the selling point of this group buy.