NZXT HUE 2 Ambient – Desktop Monitor Back-Lighting Kit – 3 RGB LED Strip Sizes – Designed for Monitors 21″ to 25” & 34” Price: $79.99 (as of 03:35 EST- More info)

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IMMERSIVE DESKTOP LIGHTING SYSTEM: Uses your walls to visually immerse you in your favorite games or create the perfect mood with ambient RGB lighting from the back of your monitor
EASY INSTALLATION AND USE: The controller and the RGB LED strips can be easily attached on the back of your display and the external power adapter streamlines cable management