Hella 7952 R2 Halogen Bulb 24V 55/50W P45T

The Hella 7952 is a classic R2 halogen headlamp bulb built for 24-volt electrical systems. If you run a commercial truck, a bus, heavy equipment, or an older import that uses the round R2 standard, this is the replacement that drops straight back into a P45T S13 socket. It's a single bulb, rated 55/50 watts, and it throws clean white light. Hella has been making headlamp bulbs for decades, and these are the kind of part you fit once and stop thinking about.

R2 is a dual-filament design. One bulb, two jobs. The 55-watt filament handles your high beam and the 50-watt filament handles your low beam, both packed into a single glass envelope with that distinctive P45T base. That's why the wattage reads as 55/50W. It isn't two options to choose between, it's both filaments living in the one bulb. So when you swap it, you restore high beam and low beam together in a single part instead of chasing two separate bulbs.

The 24-volt rating matters more than people expect. A lot of headlamp bulbs are 12V, and a 12V bulb simply won't work right in a 24V system. Commercial rigs, buses, military and agricultural equipment, and a good number of European heavy vehicles run 24-volt electrical. If your machine is one of those and it uses the R2 round-base headlamp, the 7952 is the correct voltage for it. Check the number stamped on the old bulb or in your service manual before you order, because voltage is the one spec you can't work around.

Here's the honest part. This bulb is marked off-road use only. The R2 standard isn't recognized for on-highway headlamp use under US DOT rules, so we can't sell it to you as a street-legal headlight for the States. Plenty of people run them in equipment, on private land, in racing and show builds, or on vehicles that aren't bound by US road regulations. Just know that going in. If you need a DOT-legal replacement for a US highway vehicle, this one isn't it, and we'd rather tell you straight than have you buy the wrong thing.

As a halogen, the 7952 runs a tungsten filament inside a halogen gas fill. That lets it burn hotter and brighter than an old incandescent while staying compact. The light comes out white, which is what you want for seeing the road or a work area clearly after dark. It's proven, straightforward technology. No ballast, no driver, no extra wiring. Power in, light out.

You might see this bulb listed under two numbers. The Hella part number is 002088255, and the newer reference number is 7952. Same bulb, either way. If your paperwork or your old box shows one and the shelf tag shows the other, don't second-guess it. You've got the right part.

Installing it is simple if you've changed a headlamp bulb before. Kill the power first. Pull the old bulb, line up the P45T base, and seat the new one until it locks. One thing we tell everybody: don't touch the glass with bare fingers. The oils from your skin bake onto the envelope when the bulb heats up and can shorten its life or create a hot spot that cracks it early. Handle it by the metal base. If you do brush the glass, wipe it down with a little rubbing alcohol before you power up. That one habit gets you the full service life Hella builds in.

Not sure this is your bulb? Check three things. First, the base: it should be a P45T with the S13 locating tabs, the round flanged cap that twists into the reflector. Second, the voltage: 24V, stamped on the old bulb or listed in your manual. Third, the wattage: 55/50W for the combined high and low beam. If all three line up, the 7952 is your replacement. If your vehicle runs a different base or a 12V system, you'll want a different bulb.

For working trucks and project builds alike, keeping a spare in the toolbox is smart. Headlamp bulbs tend to quit at the worst possible moment, and a 24V R2 isn't something the corner store keeps on the shelf. Grab one for the glovebox and you're covered.