Smithsonian LED Light Base Re-create the glow-in-the-dark bioluminescence of our Baby Jellyfish Paperweight (pictured, but sold separately) anytime by placing it atop this mirrored LED Light Base with 7 multicolored LEDs, AC adapter and on/off switch Also runs on 3 AAA batteries (not included). 0.9"h. x 3.7"dia.