LEDGlow’s Million Color Mini Interior Lighting Add-On Kit allows you effortlessly add additional SMD interior lighting tubes to your existing Million Color Inteiror Lighting Kit. These add-on kits are available in 2, 4, and 6 piece kits, and all feature 4 inch tubes that house 3 SMD LEDs, and include two 3 foot USB expansion power wires for easy installation. LEDGlow's LED interior lights include a one year limited warranty and free lifetime technical support.