Features Direct replacement for factory incandescent 3156/3157-size front turn signal bulb. Adds cool white running light along with amber turn signal. High-power Samsung LEDs arranged around the bulb. No yellow appearance when switched off. Fully aluminum construction. Non-polar and CK compatible. Plug and play simple installation. Overview Upgrade. Add dual-color functionality and a modern appearance to your front turn signals with the 3156/3157 HP24 turn signal bulb. Populated with sixteen amber chips and eight white chips this bulb lights up white when your headlights are turned on and flashes amber when the turn signals are activated. Housed in an aluminum casing for maximum heatsinking properties the HP24 will last for years to come. Best of all installation only takes minutes - simply take out your factory bulb and the HP24 will fit snugly in the socket. The HP24 bulb is only suitable for vehicles that have a clear front turn signal reflector lens. Brightness. At 410 lumens the HP24 will provide about double the total light output compared to your factory bulb. All Diode Dynamics LED lighting is rated with accurate measured lumen figures not calculations or guesses. We test the true output in-house and provide you the real numbers to compare. Reliability. Unlike other bulbs on the market this bulb is built with constant-current circuitry along with transient suppression. That means this bulb will last for years not months with no flickering or failure. And like every Diode Dynamics product it's backed by an industry-leading three-year replacement warranty.