The U.S. Army Corps of Engineers is organized geographically into eight permanent divisions, one provisional division, one provisional district, and one research command reporting directly to the HQ. Within each division, there are several districts.
Laser Safety Glasses - Holmium Laser. 1  On this page you will find our range of Holmium laser safety glasses , Ruby laser safety glasses, Dye and Erbium Laser Safety Glasses. 2  Important: Australian laser safety standards AS/NZS 2211.3:2002 require L-Ratings to be clearly marked on the laser glasses.
Glow in the dark powder. This is strontium aluminate activated with europium. It's a very good glow-in-the-dark material, of the type you expose to light to charge up. It definitely works very nicely in that capacity, and can be charged in just a few minutes under fluorescent light.