Trond, maybe you could ask Slavomir at Fomafoto?
Just a comment on those leds. I bought 3 of the bigger size ones for a 11m2 room and they are very very dim. I had to add a couple normal red safelights. Considering the high price I don't think they are a good value at all.
It will depend heavily on what color your walls are. Light colored walls will require less safelight illumination. My darkroom, which has medium-grey walls and is about 3/4 as large as yours, has two Kodak beehives with OC filters 2 meters above my 3.3meter sink (one light over each end) and is adequate for my needs. The enlarger is opposite one end of the sink, and even when the easel is in my shadow cast by the safelight, I can function adequately. Many workers prefer near-white walls.
Originally Posted by Vania