12V 12-LED BAY15D 1157 Red Color Automotive Globe - Reverse/Indicator Light Bulbs (Package of 2 Items) Polarity: + on the tip and - on the casing. Pls noted it before you purchase. 1.Canbus bulbs also not directly to fit all cars, sometimes error code or hyper flashing occurred ,please add resistor or cancellor or flash relay, the problem will be solved. For the brightness,please refer to the luminous, higher value will be brighter LED bulb has resistance so that bulb will become hot when working while it not affect its performance. LED bulb is low power consumption,so counted by theoretical power but not actual power. Because the resistor on bulb so that actual power is much less than theoretically power.