You must work in very different conditions from me. I work in a room with a lot of light and my UV printer is always shielded so when it is on there is virtually no light leaking out. The only time I work in low levels of light is when coating and drying sensitized mateial, and in those circumstances I sure am not going to have the UV light on!!
But one can not be to careful in protecting their eyes from UV light.
In any event this has strayed from the point. You stated that you did not recommend BLB tubes. What I wanted to do was point out that these tubes are in fact highly efficient in printing alternative processes. They are just slightly slower than BL tubes, print virtually on par in tems of speed with AQUA and SA tubes, and are quite a bit faster than NuArc 26-1K. Plus, as I mentioned in the earlier message, the strange light really highlights debris that tends to settle on the glass of the priinting frame or vacuum easel, which really helps to make clean prints.