Installation: All of our halogen lamps are designed for easy DIY installation direct replacement. If halogen lamp doesnt light up after installation, please simply re-insert it oppositely (because halogen lamps has polarity like a battery). Attention: In case the halogen lamps doesnt light up, fit it 180 degrees Features: Socket type: 1156 BAY9S H21W Light color: White Working Voltage: DC 12V Lumen: 250LM Current: 1.5A Size: 3.4x0.8cm/1.34x0.31 Quantity: 2 Pcs/1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Contents: 2 x Halogen Lamp