Specially designed low voltage mercury vapour lamps which radiate ultraviolet rays of 250 – 260 mm. This short wave ray is a very effective bactericide for medical and sanitary purposes, such as the germicide of food stuff in the refrigerator, table ware, cooking utensils in the galley, and barber tools, room air, etc. This lamp comes in the same type and sizes as common fluorescent tube lamps and can be used within the same fixture. 5 sizes are available. Specify when ordering.