This listing features 2 pieces of Brand New， Pure White 3157-Genuine Cree-30W LED bulbs bulit with high quality Aluminum materials and best component. Each LED bulb contains Six 5 watt High power Genuine Cree Q5 chips inside， comes with Projector Lens， 360 degree light angle.The result is amazing. It is an ideal addition to any vehicle. 30 watt output! Super birght ! - 100% Brand new and tested - 500 LM total output - Low Power Consumption and heat cool metal Aluminum- 12VDC replacement bulb for Car Tail Brake LED light applications. - 6x5W Genuine Cree High Power Chip (5W x 4 Sides+ 5W x 2 pcs R4 on the Top=30W) - Easy to install， Direct replacement， no wiring needed - Most vehicle applications required 2 bulbs. - For eyessafety， please don't look directly at the bulb within one meter.1.For 12 volts2. Constant Current LED Driver Transformer3. With overload protection， short circuit protection and over temperature protection 4.Number of Bulbs: 2 PCS5.LED Color: Pure White (6000K-6500K)6. Lifetime: 50000hours 7.LED Type: 3157 Cree Q5， 30W8. Dimension: 18mm X 55mm 9.Weight:14.70g10. Cross Reference: 3157 3057 3047 3155 4114 4057 4157……(For Reference Only) 11. Application:For use as Tail Brake LED Light. Replaces the Car/Boat/RV/Motorcycle Bulbs:Also can be used for Turn Signal Light ( The Resistor will be needed)， For Load Resistor，Check Here IMPORTANT:Our bulbs come with Standard Base， NOT CK Type. Don't put standard bulbs into CK type sockets. It may pop the fuse or blow the bulb. Or the bulb will light up amber ONLY.You can use a electroprobe to check the two Positive points before installation if you're not sure.