I have the Krill AA and AAA, Glow-Toob and Glow-ring. Depending upon what you plan on using them for, it is hard to say which is better. As Ted stated the Glow-Toob is the brightest and can be used for an area light in a tent, the FX model has the additional feature of flashing modes. If you are looking for a distance marker, then either the AA/AAA Krill or Glow-Toob will work. If you want just a marker for personal items – knife, flashlight, etc. then the Glow-ring would be best. Glow-rings are available from overseas, to date I have had no problem with delivery issues.

Pete