This lightweight and powerful UV Light Base measures 10" in diameter, and features 40 independent UV LED bulbs arranged in expanding concentric circles radiating out from the center of the base. The unit includes a convenient wall-plug power adapter, but can also be powered by 8 AA batteries, making the unit portable and operable regardless of access to electric power You can also use the base to either display or very rapidly recharge glow-in-the-dark toys & posters. Also makes a great addition to party displays or house parties. A 10" UV LED light base. Can be powered either by 8 x AA batteries (not included) or the included 12V adapter. Stands 1-1/8" tall.