So my sodium safelight stopped working. I hope it is the ballast and not the bulb. I was scrambling to put together a makeshift safelight in the meantime, and think I may have come up with something better. I had a 12" undercounter LED strip that I was using as a white light near the enlarger. I wrapped it in 2 layers of rubylith film taped up with gaffer tape, clamped it under a shelf about 3-1/2 to 4 ft above the wet area and performed the Kodak safelight test. No problem. It is much brighter than what I had been using and has worked like a charm so far. I guess I could add a few more layers of rubylith or ND gel to be on the safe(r) side. I took some pictures, but the iPhone wants to correct the light to white, doesn't show the color well.