Our original unit, the GLO-TOOB is available in five colours - red, amber, blue, green and white. The GLO-TOOB has a single operational mode - steady on 100% brightness. Each unit is powered by an inexpensive 12V (23A) alkaline battery which is readily available at a nominal cost. This battery will power the unit for approximately 30 hours (8 hours maximum brightness) after which the battery can be replaced.