The plastic Tupperware boxes are a good idea. Another not so smart way that I have seen lenses stored up as are in card board boxes about the size of the lenses. The lenses are just stacked on top of the next and that makes for a risky situation, if any sharp material is stuck in between 2 lenses, it will scratch them up both.
Just as I side note.... I saw on their website that Bardwell and McAlister has a 6 or 12 light fays using the HPL's. Infact, they just started making a space light using HPL lamps as well. Interesting.
On their website they also say that the Police tour is using their 12-light HPL fays.