Socket : 1156 P21W BA15S 1156 PY21W BAU15S 1157 P21/5W BAY15D T20 7440 W21W WY21W T20 7443 W21/5W T25 3156 P27W T25 3157 P27/7W For CANBUS declarations: The bulbs have canbus functionality and better compatibility, but there are still some cars like 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, Al*a R**eo and so on that have super flash or error codes or don't work, It is recommended to purchase a Canbus load resistance decoder at the same time. We cannot guarantee that Canbus LEDs will work in all cars Customers have concerns about this, please place orders with caution. If you pay for an order, you agree to and understand this statement. Note: The bulbs are equipped with Canbus, but there are still a few vehicles that may need to add an additional load resistance decoder to bypass the error code/flicker/not working issue. In the following cases, there is no problem with the bulb, if you mind please place an order with caution. 1. The bulb does not light up or the bulb is on for a while, then it goes out or the bulb flashes. 2. The dashboard displays an error code or the radio is disturbed. Due to the super power 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 pair of 50W 6 ohm resistors. Voltage: DC12V Current: 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: 2100LM Number of LEDs: 3014-144SMD Color: White/Red/Yellow(amber) Application: Car, motorcycle, truck, SUV, ATV, etc. Heat Dissipation Theory: Aviation aluminum 6063 Waterproof: IP68 Usage:Reverse lights,turn signal lights and brake lights Features: 1.High efficiency and low power consumption 2.Environment friendly and energy saving 3.Faster on/off response time and vibration resistant 4.With a long lifespan up to 50,000 hours 5.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. _x000D_