LED light bulbs for home, MR11 light bulbs led replacements, GZ4 standard base, 12 volt and 24 volt low voltage operation led lights. Dimension:Φ35×35mm. Indoors use only, IP50. Using 12 pcs 5050 SMD high luminous flux LEDs (max 0.2 watt each led), LED floodlight with 120 degree beam, Dayligjht White 6000K~6500K, As 15~20 Watts replacements. Light output 170 Lumens. DC 10V~30V or AC 10~18V wide rage voltage operation (constant current controller inside), Means that it can work on AC12V/DC12V Or DC 24V or any other voltage between 10V and 30V. Note that it can't work on AC power supply which over 18V. Lifespan of up to 50,000 hours means that equates to 18 years lifetime if turn on lamp 8 hours a day. These bulbs are perfect for the inside case lighting for jewelry, no heat and good lighting.