Here you can find equipment for creating night and UV caches. Reflective tacks or stickers are a handy way to marking the way to a night cache in a way that is difficult to spot in daylight. For UV caches you will need an UV marker, which contains ink that is only visible under UV light.
Night and UV Caches
Edding 8280 Securitas UV Marker
6.99 €
There are 12 pcs in stock.