This kit provides four 194 series LED bulbs to replace the factory incandescent bulbs that illuminate the gauges. You also get your choice of color between red, green, or blue. We settled with the HP3 bulbs from Diode Dynamics as it was the dimmest bulb offered with a diffuser lens. Any brighter would be far too bright and the dimmer option, without the lens, had noticeable bright spots. The dimmest setting with these LEDs is about the same as the brightest setting with the incandescent bulbs, so if you prefer to have your dimmer turned down, this may not be the kit for you.
NBs need a different bulb for the odometer, so be sure to get the appropriate color for your car. NAs don't have a separate odometer bulb.
We use LEDs from Diode Dynamics because they're the best ones we've found. They're made in the US to high standards, not just the minimum price. They've got constant-current circuitry to protect the bulbs from transients and offer a three-year warranty.