Hey there! Looking to upgrade your car's interior lighting? These uxcell T4.2 LED bulbs are just what you need. They're super bright, energy-efficient, and last way longer than those old traditional bulbs. Perfect for your dashboard, reading lights, or even backup lights – they fit cars, trucks, motorcycles, RVs, boats, you name it! Installation is a breeze: no wiring needed, just plug and play. But heads up – before buying, double-check that your socket is T3 wedge type and that the bulb length fits your car. If the LED doesn’t light up at first, no worries! Just rotate it 180 degrees to reverse the polarity. Each pack comes with 6 ready-to-use bulbs. Details: Material is plastic, shell color is white, dimensions are 10mm x 8mm (about 0.39” x 0.31”), light color is cool white, LED count is 1 per bulb, socket type is T4.2, and style is 3020. Great for a crisp, modern look inside your ride!