The Kitronik Round 5V LED Matrix Light Kit is a small and easy to assemble kit. Provides very bright light. The unit comes with 9 white super flux LEDs with a total output of approximately 16,000mCd.
The unit has a built-in current limiting resistor so it can be powered by a 5V power supply or 3 AA batteries. (3 new AA batteries will last for about 5 hours.)