I bought a stack of this stuff(Blue, White and Red) from HK years ago for various uses. It works great and very bright.
You can get it cheaper if buying in bulk on ebay, but I threw it in when padding out a large HK order.
HK are very cunning in this respect... they tell you how much the total weight of your order is and how much extra weight you can add before freight increases to the next level... I find myself buying all sorts of handy little things I wouldn't normally have bought
