I recently redid my darkroom. I went with lots of standard (5x7 and 10x12) with low wattage bulbs, lower than normal, 15W. I have 6 or 7 safelights in a 9 x 12 darkroom. This give nice light and the corners are not dark or shadowy, but I don't get much light directly under the enlarger. Most of the walls are very dark except by the sink where they are white. I'd like to change some of the bulbs to red LED bulbs as I did have some foggy with some papers and ortho film. On some of the safelights that I use for ortho film I have extra #25 red lighting gel to clean it up and darken down.