LOFTEK Outdoor/Indoor Rechargeable RGB LED Light bulb (4.7" LED Base) LOFTEK Outdoor/Indoor Rechargeable RGB LED Light bulb (4.7" LED Base) 4.7-inch Bulb Replacement: available for 12-inch &16-inch LED Ball Light and Cube Light. More information: Rechargable, 16 Color Change, 4 Adjustment Modes. Tip: please use original 4.2V Adapter to recharge the bulb, otherwise it may cause damage to the battery.