The convoy S2+ with Nichia and Djozz board is great
you get about 1W of UV which is powerful enough for most purposes
even greater with Filter
the only downside is that when the battery falls below 3.9V the LED gets dimmer continously as it has a high forward voltage
but I did not find any 18650 driver that boosts to 4V
The thing is any UV emitter from a good brand with filter is great
as the visible wastelight gets absorbed
most affordable Emitters get to 1-1.5W with a little more current over the manufactors rating
here you can find a full test of 13 UV lights with different emiters
specs and price
Noname 41x 5mm UV LED ~8$
Ultrafire WF-502 B 395-410nm ~8$
Convoy S2+ Nichia NVSU233A 365nm ~80€
Convoy S2+ mit intl-outdoor UV LED 365nm ~25€
Ultrafire C3 UV (AA) 365nm ~11$
Convoy S2+ mit Seoul UV 520mW* 365nm / ~50$
Solarforce L2M UV Dropin 380-450nm / ~20€
BLF Romisen 365nm + 400nm ~13$
Ultrafire WF-501B 365nm ~20€
Jaxman E3 (AA)* 365nm ~25$
Jaxman U1* 365nm ~25$
Convoy S2+ Nichia (vermutl. NCSU276A) 365nm ~25$
Convoy BD04 3W UV Zoomlampe 365nm ~35$
peak wavelenghs
whitewall shots
you can see the Convoy Lights are the most powerful in this test
