Geocaching.com says this about night caches:
Night caches are designed to be found at night. They are difficult or impossible to find during the day. Typically, geocachers use a flashlight or UV light to follow a series of reflectors to the final location.
Night geocaches can be Mystery Caches or Multi-Caches. The posted coordinates are often the location of the first reflector or UV mark. Like all geocaches, night caches must involve GPS use for at least part of the search. This means that following reflectors from the parking lot to the container is not enough.
To find this night cache you have to read this description carefully before you start!
Go to start coordinates and find the first reflector, (White, round, 10 mm in Ø), go past the reflector find the next and so on, until you find the first point to make a projection from.
You can't always see the next reflector, but you will always stay on a parth/road. No need to go in "terrain mode" before the seach for the final.
If you see 2 reflectors close to each other, you are probertly looking at a deer or a sheep, or maybe the place for the final location.
If you see 3 reflectors in a small triangle, pointing up, you are at point 01. You have to make a projection from point 01 to the next reflector. 234,5 degreese 678,9 meters. Here you can continue to find and follow reflectors.
If you see 3 reflectors in a triangle pointing down, you will have to make a new projection: X degreese and Y meters to find the final location.
Y meters. Y is is the number of the first house on your left side after you have found the reflectors again after the first projection -30
(reduced cross sum of the housenumber = 5)
X degreese. X is twice the house number of the day care center where you started +Y
(If you find 2 housenumbers, use the one with reduced cross sum = 8)
OBS Total walking distance: minimum 7 km.
