I purchased Red LED Lamps from Superbright. I initially tested for fogging (using Kodak instructions) and found that I could get limited time (3 minutes) with Ilford VC Resin coated paper with 2 lamps bounced off of a white ceiling. This is in an 11 x 14 darkroom.

When I tested Arista EDU VC R/C paper I found it much more sensitive.

I finally placed one lamp in a globe fixture in the center of the ceiling and put a layer of Rubylith over the lamp (not the globe). That got me to 7 minutes, but it is still plenty bright. I can read instruction sheets, a stopwatch, etc by the safelight alone.

I went through a lot of paper, but in the end it was well worth it.