Socket : 1156 PY21W BAU15S 1156 P21W BA15S 1157 P21/5W BAY15DT20 7440 W21W T20 7443 W21/5W T25 3157 P27/7WFor CANBUS declarations:The bulb has Canbus function and better compatibility, but there are still some cars (such as Volk *wagen, Me*cedes-B*nz, B*W, A*di, K*a, O*el, Re*ult, H * t, Lo*o, Sk*da, J*ep, D*dge, Ch*ysler, V*lvo, F*at, F*rd, S*at, etc.) will appear hyper flash or error or not work, it is recommended to buy a load resistor at the same time. We cannot guarantee that the canbus led will fit all cars! Customers who are concerned about this, please place an order with caution. If you place an order, it means that you have understood and agreed to this statement.Due to the superpower of the bulb, it emits a lot of heat during operation, and can only be used for turn signals, reversing lights, and brake lights. It cannot be used for headlights, fog lights, daytime driving, etc.If you need to install 4 at the same time, very few cars will cause errors or super flash problems, please buy resistors together to solve the problem, 4 bulbs need 2 pairs of 50W 6 ohm resistors.Voltage: DC12VCurrent: about 1.75/0.25/0.75A [Measurement errors are normal]Power: about 21w (single contact),3w/9.5w (double contact) [Measurement errors are normal]Lumens: 2100LMNumber of LEDs: 3014-144SMDColor: White/Red/Yellow(amber) Application: Car, motorcycle, truck, SUV, ATV, etc.Heat Dissipation Theory: Aviation aluminum 6063Waterproof: IP68Usage: Reverse lights, turn signal lights, and brake lightsFeatures:1. High efficiency and low power consumption2. Environment-friendly and energy saving3. Faster on/off response time and vibration resistant4. With a long lifespan of up to 50,000 hours5. With 3014-144SMD high-brightness LED, brighter than ordinary incandescent bulbs.6.360 Degree Beam Angle design lights up every corner.7. Easy to install, plug and play.Package includes: 2Pcs LED BulbsNOTE:1. If the bulb has a hyper flash or an error, please add a load resistor decoder.2. With DC 12v power supply, it can be judged whether the bulb itself is working.3. Please confirm your socket before making an order. Thank you.