Gert-Jan Arijjansen did send me this photo.
The beacon is just north of the runway of the airport of Kittilä.
The route given by Google Earth is as follows:
Start to north-west direction on the Havutie to Lukkarintie - 93 m
Turn richt at Lukkarintie - 0.3 km
Turn left at 79/Valtatie.
Drive on at 79 - 8.1 km.
Locator L, © photo: Gert-Jan Arijjansen