The Foxfury Forensics 930-312 is a powerful 470 nm (blue light) CREE LED alternate light source (ALS) for general crime scene search. It is made of aircraft-grade aluminum and runs on 3 CR123 batteries. Being accurate to plus or minus 3 nm, it is used by forensic and CSI personnel in the lab and field to search for footwear (and other) impressions, trace evidence (hairs, fibers, etc.), gunshot residue (GSR) and blood spatter. It is used with orange goggles.