Stabila 39340 196 LED"The Lights" Level Kit, a 48" Level with Two Illuminated Vials and Two Light Packs Brilliant, easy to read lit vials Two Removable L.E.D. Lights, can be used as stand alone flashlights Lights work vertically or horizontally Replacement light packs available (20090) Easily replaced AAA battery provides 5 hours of continuous use (approx. 600 uses)