Product informationNote 4 AA batteries not includedNote 4 AA batteries not includedNote 4 AA batteries not included254nm Shortwave and 365nm Longwave UV Lamp for Fluorescent StampsBanknotesPlease note These 2 lamps do not have an optical filter, they cannot be used for mineral lighting.Longwave lampThis longwave lamp shows you the different types of fluorescent and colored bands on GB stamps see illustration for blue and yellow.It also works on stamps from Australia, Canada, China, France, Germany, Hong Kong, Meiko, Norway and Russia.This lamp will also detect different paper types, such as OCP, FCP, PCP and ACP.For best results, use in a dimly lit room against a dark background. This handheld portable model requires 4 AA batteriesShortwave lampThis shortwave lamp clearly shows the phosphor and phosphor afterglow on GB stamps up to 1992.For best results, use a shortwave lamp in a dark room, the darker the room the better.To see the different colored phosphors on the 1960 Wildings edition, it is the phosphor afterglow you are looking for when you turn off the UV light,Green phosphor is the brightest 10 second afterglow followed by blue 15 seconds, Violet has a very short afterglow 5 seconds. It will be difficult to seeafterglow in daylight, the darker the room the better.This two handheld portable model requires 4 AA batteries not includedNote Due to the light and screen difference, the items color may be slightly different from the pictures. We guarantee that the style is the same as shown in the pictures.The package contains1365nm long wave UV lamp1254nm shortwave UV lamp