UnionD via Amazon offers the Viivria Colorful Disco Ball Light for $13.59. Coupon code "GF8EJ9LY" drops it to $9.51. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.03.) That's the lowest total price we could find by $10. It features a Bluetooth remote and LED bulbs.