Can-bus Ultra Bright 3157 LED stop/tail Bulb. 360 degree light with 92 SMD white or red LEDs. These bulbs are also known as capless LED bulbs. These bulbs are the brightest available & have been designed with special constant power drivers to work with most modern car Can Bus systems for error free upgrade from standard bulbs to LED bulbs. In most applications these bulbs therefore don't require the additional resistors.