This is the one forensic light source you are going to want by your side! The UltraLite One 3-in-1 ALS is a one unit, one head powerhouse, with every light you’re going to need at the push of a button: 400, 450, & 525 nm. With this one ALS, you’ll be able to detect 99.5% of all trace evidence, and you’ll never worry about batteries with the internal lithium-ion battery. The UltraLite ALS size, weight, and ergonomic design make it the easiest and most comfortable to use forensic light system in the world.