receive in good condition thanks
Like other 365nm LEDs, they emit also visible light. In the first picture you can see a 50 Euro banknote in the LED's direct light; in the other pictures, LED's light is filtered by a classic ZWB2 filter (in the fourth picture).
I have to say that these LEDs emit MUCH more visible light than 3W LEDs I already bought. The other LEDs give good results also without a filter!