I’ve been a fan of Diode Dynamics‘ LED bulbs ever since I replaced all my Subaru BRZ‘s bulbs with LEDs. They have excellent customer service and they stand behind their products with a great three year warranty. They recently introduced a couple new LED bulb to their line up, the HP3 and HP5. The HP3 and HP5 are replacement bulbs for 194 sized sockets. They work for anything from your trunk, door and sidemarker lights around your vehicle.
Before these bulbs were introduced, the brightest bulb you could get were the SMD5s, which featured five LEDs placed around the bulb. They worked well but the HP3s are slightly brighter and offer a deeper color. Take a look below at the old SMD5 bulb.
Versus the new HP3 amber bulbs.
As you can see, the new HP3 bulbs are not only brighter but put out a deeper orange color, perfect for staying visible at night. The HP3 bulbs are designed to disperse light more evenly and stay cooler during extended use.
The best thing about the HP3 bulbs is that they are non-polarity bulbs, meaning you can install them any way. The old SMD5 bulbs required me to test that they turn on before I finalized installation.
One thing to note if you’re using replacing your incandescent sidemarker bulbs for your Subaru BRZ or FR-S is that the LED contacts are just a bit too narrow for the sidemarker socket. I recommend bending the contacts outward just a little to make sure they have good contact with the terminals.
I’ve been using the HP3 bulbs for over a week now and they look so much better than the SMD5 bulbs. I haven’t had either sidemarker bulbs fail or any flickering issues. Highly recommended.