This 1158 works in Positive Chassis or Negative Chassis vehicles, trucks and motorcycles. Special design for older cars. 1158 with a BA15D DC Bayonet base and two brightness levels. The life is up to 30,000 hours. Available in white 6000 Kelvin, warm white 3000 Kelvin, Red 625 nm Green 526 nm, Blue 464 nm& Yellow 594 nm. Available 1158 BA15D. Great bulb for tight fit, this small high power led is great for all applications, very bright 260 lumen output in 360 degree illumination. This bulb will operate in classic old cars with positive chassis or negative chassis car or bike, low voltage. Comparable to a 25 watt incandescent, very small fits it tight bulb locations. CE and Rohs listed. Works good for navigation lights for its small profile, operates both AC or DC. Each 5730 chip is the latest in high power SMD technologies. Each 5730 SMD ship can dissipates up to 1/2 watt of power. The light output from a 5730 SMD is about 40 to 60 Lumen output per LED chip. The LED bulb is dimmable by a variable AC or DC up to 6 volts. Replace your old incandescent light bulb with a led bulb for your tail lights, brake lights and turn signals. Replace light bulbs in amusement rides, arcade, pinball games. No longer have to replace that burnt out incandescent light bulb in the pinball machine. For BA15D the bayonets each side are parallel to each other or both bayonets are the same distance from the top or the bottom of the base. This bulb works great for upgrading your vintage car to 6v led bulb. Since this bulb is non polar you do not have to worry about the socket being reversed wired. Since there are two filament brightness levels running low and brake high.