I had lunch with a LEO (Captain, SAPD) friend today, and I mentioned this subject. He laughed really hard, and told me that we wil not see ANY more radiation based lighting devices for the foreseeable future because the Department of 'Homeland' Security has put a freeze on them. Current tritiuim is OK because they have calibrated their detection gizmos to ignore it (on a good day) rather tha just miss it (which is usually). He's been to conferences pretty much all over setting up bike patrols for other departments, and he's pretty cynical about the DHS. (which, in a wonderful peice of irony, in Texas also means Department of Human Services)\