Arcon 16755 #67 Incandescent Bulb, 12V 7.1W 2-Pack

The Arcon 16755 is a #67 incandescent bulb, and it's one of those little parts you don't think about until a light on your rig goes dark. It runs on 12 volts and pulls 7.1 watts, which is exactly what most RV and boat lighting circuits are built around. You get two bulbs on the card, so you can swap the dead one and keep the spare in the console drawer or the tow vehicle for next time.

#67 is a trade number, not an Arcon invention. It's an industry-standard miniature bulb with a single-contact bayonet base, the kind you push in and give a quarter turn to lock. That standard base is why the 16755 drops straight into so many factory fixtures. If the old bulb you pulled has one contact on the bottom and two little pins on the sides of the metal base, you're almost certainly looking at the right replacement.

So where does it go? On the water and on the road, the #67 shows up in a lot of places. License plate lights are the classic one, and that's how most catalogs list this part. But you'll also find this size in dome lights, in the courtesy lamps over the steps, in side marker and clearance lights, and in small reading lamps in the cabin or coach. If a 12-volt fixture takes a single-contact bayonet bulb in this wattage range, the 16755 usually fits right in.

Installing it is about as simple as marine and RV work gets. Kill the power to the circuit, pop the lens off the fixture, press the old bulb in gently, twist a quarter turn counterclockwise, and it drops out. The new one goes in the same way, a push and a quarter turn clockwise until it seats. No tools, no wiring, no splicing. Just try not to handle the glass with greasy fingers, and wipe it clean if you do, because oils on the envelope can shorten the life of any incandescent bulb.

Let's be straight about what this is. It's an incandescent bulb, not an LED. That means it throws the warm, familiar yellow-white glow a lot of folks actually prefer inside a cabin, and it plays nice with pretty much any 12-volt circuit and any dimmer without flicker or compatibility headaches. The trade-off is that it draws more current than an LED and runs warmer to the touch, so if you're counting every last amp-hour off the house bank on a long hook, that's worth knowing. For a license plate light or an occasional courtesy lamp, though, the draw is tiny and the simplicity is tough to beat.

This is the bulb for the boater or RV owner who just wants an exact, no-drama replacement that matches what the factory put in. You're not re-engineering the fixture. You're putting the light back the way it was meant to be. And because the 16755 comes two to a card, that second bulb means you're not making another parts run the next time one burns out, which on a weekend away can be the difference between fixing it in two minutes and living with a dark plate until you're back home.

Both 12-volt RV house systems and 12-volt DC marine systems are a natural match for this bulb, so one card covers the trailer, the coach, and the boat. Keep a card in the spares kit with your fuses and connectors. Bulbs like this are cheap insurance, and a working license plate or marker light keeps you legal and visible after dark, whether you're backing the trailer down the ramp, running the no-wake zone at dusk, or pulling into a campsite after a long haul.