4″ Tunable Downlight Series NumberILDRTDMKSSize4INVoltage90V-305LED Watt20WLumen Output1,500Lighting Angle100°CRI>90DimmingAVAILColor3000K, 4000K, 5500K Our 4″ Tunable Recessed Downlight has a new, smart design with manually adjustable color temperature options. Using a 90V-305 driver, it can be controlled by a phase dimmer or 0-10V dimmer.